--- a/configure.in
+++ b/configure.in
@@ -2246,16 +2246,27 @@ changequote(,)
 $PYTHON -c "import sys; sys.exit(sys.version[:3] < sys.argv[1] or sys.version[:2] != '2.')" $PYTHON_VERSION
 _python_res=$?
 changequote([,])
 if test "$_python_res" != 0; then
     AC_MSG_ERROR([Python $PYTHON_VERSION or higher (but not Python 3.x) is required.])
 fi
 AC_MSG_RESULT([yes])
 
+dnl Check for using a custom <stdint.h> implementation
+dnl ========================================================
+AC_MSG_CHECKING(for custom <stdint.h> implementation)
+if test "$MOZ_CUSTOM_STDINT_H"; then
+  AC_DEFINE_UNQUOTED(MOZ_CUSTOM_STDINT_H, "$MOZ_CUSTOM_STDINT_H")
+  AC_SUBST(MOZ_CUSTOM_STDINT_H)
+  AC_MSG_RESULT(using $MOZ_CUSTOM_STDINT_H)
+else
+  AC_MSG_RESULT(none specified)
+fi
+
 dnl Get mozilla version from central milestone file
 MOZILLA_VERSION=`$PERL $srcdir/config/milestone.pl -topsrcdir $srcdir`
 
 dnl Get version of various core apps from the version files.
 FIREFOX_VERSION=`cat $_topsrcdir/browser/config/version.txt`
 
 if test -z "$FIREFOX_VERSION"; then
     AC_MSG_ERROR([FIREFOX_VERSION is unexpectedly blank.])
@@ -3012,57 +3023,18 @@ AC_CACHE_VAL(ac_cv_siginfo_t,
                  [ac_cv_siginfo_t=false])])
 if test "$ac_cv_siginfo_t" = true ; then
   AC_DEFINE(HAVE_SIGINFO_T)
   AC_MSG_RESULT(yes)
 else
   AC_MSG_RESULT(no)
 fi
 
-dnl Check for int16_t, int32_t, int64_t, int64, uint, uint_t, and uint16_t.
-dnl ========================================================
-AC_MSG_CHECKING(for int16_t)
-AC_CACHE_VAL(ac_cv_int16_t,
- [AC_TRY_COMPILE([#include <stdio.h>
-                  #include <sys/types.h>],
-                 [int16_t foo = 0;],
-                 [ac_cv_int16_t=true],
-                 [ac_cv_int16_t=false])])
-if test "$ac_cv_int16_t" = true ; then
-  AC_DEFINE(HAVE_INT16_T)
-  AC_MSG_RESULT(yes)
-else
-  AC_MSG_RESULT(no)
-fi
-AC_MSG_CHECKING(for int32_t)
-AC_CACHE_VAL(ac_cv_int32_t,
- [AC_TRY_COMPILE([#include <stdio.h>
-                  #include <sys/types.h>],
-                 [int32_t foo = 0;],
-                 [ac_cv_int32_t=true],
-                 [ac_cv_int32_t=false])])
-if test "$ac_cv_int32_t" = true ; then
-  AC_DEFINE(HAVE_INT32_T)
-  AC_MSG_RESULT(yes)
-else
-  AC_MSG_RESULT(no)
-fi
-AC_MSG_CHECKING(for int64_t)
-AC_CACHE_VAL(ac_cv_int64_t,
- [AC_TRY_COMPILE([#include <stdio.h>
-                  #include <sys/types.h>],
-                 [int64_t foo = 0;],
-                 [ac_cv_int64_t=true],
-                 [ac_cv_int64_t=false])])
-if test "$ac_cv_int64_t" = true ; then
-  AC_DEFINE(HAVE_INT64_T)
-  AC_MSG_RESULT(yes)
-else
-  AC_MSG_RESULT(no)
-fi
+dnl Check for int64, uint, and uint_t.
+dnl ========================================================
 AC_MSG_CHECKING(for int64)
 AC_CACHE_VAL(ac_cv_int64,
  [AC_TRY_COMPILE([#include <stdio.h>
                   #include <sys/types.h>],
                  [int64 foo = 0;],
                  [ac_cv_int64=true],
                  [ac_cv_int64=false])])
 if test "$ac_cv_int64" = true ; then
@@ -3092,29 +3064,16 @@ AC_CACHE_VAL(ac_cv_uint_t,
                  [ac_cv_uint_t=true],
                  [ac_cv_uint_t=false])])
 if test "$ac_cv_uint_t" = true ; then
   AC_DEFINE(HAVE_UINT_T)
   AC_MSG_RESULT(yes)
 else
   AC_MSG_RESULT(no)
 fi
-AC_MSG_CHECKING(for uint16_t)
-AC_CACHE_VAL(ac_cv_uint16_t,
- [AC_TRY_COMPILE([#include <stdio.h>
-                  #include <sys/types.h>],
-                 [uint16_t foo = 0;],
-                 [ac_cv_uint16_t=true],
-                 [ac_cv_uint16_t=false])])
-if test "$ac_cv_uint16_t" = true ; then
-  AC_DEFINE(HAVE_UINT16_T)
-  AC_MSG_RESULT(yes)
-else
-  AC_MSG_RESULT(no)
-fi
 
 dnl On the gcc trunk (as of 2001-02-09) _GNU_SOURCE, and thus __USE_GNU,
 dnl are defined when compiling C++ but not C.  Since the result of this
 dnl test is used only in C++, do it in C++.
 AC_LANG_CPLUSPLUS
 
 AC_MSG_CHECKING(for uname.domainname)
 AC_CACHE_VAL(ac_cv_have_uname_domainname_field,

--- a/content/media/webm/nsWebMReader.h
+++ b/content/media/webm/nsWebMReader.h
@@ -34,23 +34,28 @@
  * and other provisions required by the GPL or the LGPL. If you do not delete
  * the provisions above, a recipient may use your version of this file under
  * the terms of any one of the MPL, the GPL or the LGPL.
  *
  * ***** END LICENSE BLOCK ***** */
 #if !defined(nsWebMReader_h_)
 #define nsWebMReader_h_
 
+#include "mozilla/StdInt.h"
+
 #include "nsDeque.h"
 #include "nsBuiltinDecoderReader.h"
 #include "nsWebMBufferedParser.h"
 #include "nsAutoRef.h"
 #include "nestegg/nestegg.h"
+
+#define VPX_DONT_DEFINE_STDINT_TYPES
 #include "vpx/vpx_decoder.h"
 #include "vpx/vp8dx.h"
+
 #ifdef MOZ_TREMOR
 #include "tremor/ivorbiscodec.h"
 #else
 #include "vorbis/codec.h"
 #endif
 
 class nsMediaDecoder;
 

--- a/gfx/2d/Types.h
+++ b/gfx/2d/Types.h
@@ -33,32 +33,17 @@
  * the provisions above, a recipient may use your version of this file under
  * the terms of any one of the MPL, the GPL or the LGPL.
  *
  * ***** END LICENSE BLOCK ***** */
 
 #ifndef MOZILLA_GFX_TYPES_H_
 #define MOZILLA_GFX_TYPES_H_
 
-#if defined (_SVR4) || defined (SVR4) || defined (__OpenBSD__) || defined (_sgi) || defined (__sun) || defined (sun) || defined (__digital__)
-#  include <inttypes.h>
-#elif defined (_MSC_VER)
-typedef unsigned __int8 uint8_t;
-typedef __int16 int16_t;
-typedef unsigned __int16 uint16_t;
-typedef __int32 int32_t;
-typedef unsigned __int32 uint32_t;
-typedef __int64 int64_t;
-typedef unsigned __int64 uint64_t;
-
-#elif defined (_AIX)
-#  include <sys/inttypes.h>
-#else
-#  include <stdint.h>
-#endif
+#include "mozilla/StdInt.h"
 
 #include <stddef.h>
 
 namespace mozilla {
 namespace gfx {
 
 typedef float Float;
 

--- a/gfx/layers/basic/BasicLayers.cpp
+++ b/gfx/layers/basic/BasicLayers.cpp
@@ -60,16 +60,18 @@
 #include "ThebesLayerBuffer.h"
 #include "nsIWidget.h"
 #include "ReadbackProcessor.h"
 #ifdef MOZ_X11
 #include "gfxXlibSurface.h"
 #endif
 
 #include "GLContext.h"
+
+#define PIXMAN_DONT_DEFINE_STDINT
 #include "pixman.h"
 
 namespace mozilla {
 namespace layers {
 
 class BasicContainerLayer;
 class ShadowableLayer;
 

--- a/gfx/thebes/woff.h
+++ b/gfx/thebes/woff.h
@@ -35,28 +35,17 @@
  *
  * ***** END LICENSE BLOCK ***** */
 
 #ifndef WOFF_H_
 #define WOFF_H_
 
 /* API for the WOFF encoder and decoder */
 
-#ifdef _MSC_VER /* MS VC lacks inttypes.h
-                   but we can make do with a few definitons here */
-typedef signed char    int8_t;
-typedef short          int16_t;
-typedef int            int32_t;
-typedef unsigned char  uint8_t;
-typedef unsigned short uint16_t;
-typedef unsigned int   uint32_t;
-typedef unsigned __int64  uint64_t;
-#else
-#include <inttypes.h>
-#endif
+#include "mozilla/StdInt.h"
 
 #include <stdio.h> /* only for FILE, needed for woffPrintStatus */
 
 /* error codes returned in the status parameter of WOFF functions */
 enum {
   /* Success */
   eWOFF_ok = 0,
 

--- a/js/src/Makefile.in
+++ b/js/src/Makefile.in
@@ -282,16 +282,17 @@ VPATH		+= \
 EXPORTS_NAMESPACES += mozilla
 
 EXPORTS_mozilla = \
 		Attributes.h	\
 		GuardObjects.h \
 		MSStdInt.h \
 		RangedPtr.h \
 		RefPtr.h \
+		StdInt.h \
 		Types.h	\
 		Util.h \
 		$(NULL)
 
 ifdef ENABLE_METHODJIT
 
 ###############################################
 # BEGIN include sources for the method JIT

--- a/js/src/configure.in
+++ b/js/src/configure.in
@@ -2102,16 +2102,27 @@ changequote(,)
 $PYTHON -c "import sys; sys.exit(sys.version[:3] < sys.argv[1] or sys.version[:2] != '2.')" $PYTHON_VERSION
 _python_res=$?
 changequote([,])
 if test "$_python_res" != 0; then
     AC_MSG_ERROR([Python $PYTHON_VERSION or higher (but not Python 3.x) is required.])
 fi
 AC_MSG_RESULT([yes])
 
+dnl Check for using a custom <stdint.h> implementation
+dnl ========================================================
+AC_MSG_CHECKING(for custom <stdint.h> implementation)
+if test "$MOZ_CUSTOM_STDINT_H"; then
+  AC_DEFINE_UNQUOTED(MOZ_CUSTOM_STDINT_H, "$MOZ_CUSTOM_STDINT_H")
+  AC_SUBST(MOZ_CUSTOM_STDINT_H)
+  AC_MSG_RESULT(using $MOZ_CUSTOM_STDINT_H)
+else
+  AC_MSG_RESULT(none specified)
+fi
+
 MOZ_DOING_LTO(lto_is_enabled)
 
 dnl ========================================================
 dnl System overrides of the defaults for target
 dnl ========================================================
 
 case "$target" in
 *-aix*)
@@ -2915,38 +2926,16 @@ AC_CACHE_VAL(ac_cv_siginfo_t,
                  [ac_cv_siginfo_t=false])])
 if test "$ac_cv_siginfo_t" = true ; then
   AC_DEFINE(HAVE_SIGINFO_T)
   AC_MSG_RESULT(yes)
 else
   AC_MSG_RESULT(no)
 fi
 
-dnl Find exact-width integer types, or figure them out
-dnl ourselves.
-dnl ========================================================
-dnl Once this is working, we can delete the code for int16_t,
-dnl etc. below.
-
-MOZ_CHECK_HEADER(stdint.h)
-if test "$ac_cv_header_stdint_h" = yes; then
-    AC_DEFINE(JS_HAVE_STDINT_H)
-else
-    dnl We'll figure them out for ourselves.  List more likely types
-    dnl earlier.  If we ever really encounter a size for which none of
-    dnl the listed types are appropriate, we'll get a configure-time
-    dnl error; just add the right answer.
-    MOZ_N_BYTE_TYPE(JS_INT8_TYPE,  1, [char])
-    MOZ_N_BYTE_TYPE(JS_INT16_TYPE, 2, [short int long])
-    MOZ_N_BYTE_TYPE(JS_INT32_TYPE, 4, [int long 'long long' short])
-    MOZ_N_BYTE_TYPE(JS_INT64_TYPE, 8, [int long 'long long'])
-    MOZ_N_BYTE_TYPE(JS_INTPTR_TYPE, sizeof (void *),
-                                      [int long 'long long' short])
-fi
-
 MOZ_SIZE_OF_TYPE(JS_BYTES_PER_WORD, void*, 4 8)
 if test "$moz_cv_size_of_JS_BYTES_PER_WORD" -eq "4"; then
   AC_DEFINE(JS_BITS_PER_WORD_LOG2, 5)
 elif test "$moz_cv_size_of_JS_BYTES_PER_WORD" -eq "8"; then
   AC_DEFINE(JS_BITS_PER_WORD_LOG2, 6)
 else
   AC_MSG_ERROR([Unexpected JS_BYTES_PER_WORD])
 fi
@@ -2959,70 +2948,18 @@ if test "$ac_cv_header_endian_h" = yes; 
     AC_DEFINE(JS_HAVE_ENDIAN_H)
 fi
 
 MOZ_CHECK_HEADERS(sys/isa_defs.h)
 if test "$ac_cv_header_sys_isa_defs_h" = yes; then
     AC_DEFINE(JS_HAVE_SYS_ISA_DEFS_H)
 fi
 
-dnl Check for int16_t, int32_t, int64_t, int64, uint, uint_t, and uint16_t.
+dnl Check for uint and uint_t.
 dnl ========================================================
-AC_MSG_CHECKING(for int16_t)
-AC_CACHE_VAL(ac_cv_int16_t,
- [AC_TRY_COMPILE([#include <stdio.h>
-                  #include <sys/types.h>],
-                 [int16_t foo = 0;],
-                 [ac_cv_int16_t=true],
-                 [ac_cv_int16_t=false])])
-if test "$ac_cv_int16_t" = true ; then
-  AC_DEFINE(HAVE_INT16_T)
-  AC_MSG_RESULT(yes)
-else
-  AC_MSG_RESULT(no)
-fi
-AC_MSG_CHECKING(for int32_t)
-AC_CACHE_VAL(ac_cv_int32_t,
- [AC_TRY_COMPILE([#include <stdio.h>
-                  #include <sys/types.h>],
-                 [int32_t foo = 0;],
-                 [ac_cv_int32_t=true],
-                 [ac_cv_int32_t=false])])
-if test "$ac_cv_int32_t" = true ; then
-  AC_DEFINE(HAVE_INT32_T)
-  AC_MSG_RESULT(yes)
-else
-  AC_MSG_RESULT(no)
-fi
-AC_MSG_CHECKING(for int64_t)
-AC_CACHE_VAL(ac_cv_int64_t,
- [AC_TRY_COMPILE([#include <stdio.h>
-                  #include <sys/types.h>],
-                 [int64_t foo = 0;],
-                 [ac_cv_int64_t=true],
-                 [ac_cv_int64_t=false])])
-if test "$ac_cv_int64_t" = true ; then
-  AC_DEFINE(HAVE_INT64_T)
-  AC_MSG_RESULT(yes)
-else
-  AC_MSG_RESULT(no)
-fi
-AC_MSG_CHECKING(for int64)
-AC_CACHE_VAL(ac_cv_int64,
- [AC_TRY_COMPILE([#include <stdio.h>
-                  #include <sys/types.h>],
-                 [int64 foo = 0;],
-                 [ac_cv_int64=true],
-                 [ac_cv_int64=false])])
-if test "$ac_cv_int64" = true ; then
-  AC_DEFINE(HAVE_INT64)
-  AC_MSG_RESULT(yes)
-else
-  AC_MSG_RESULT(no)
-fi
 AC_MSG_CHECKING(for uint)
 AC_CACHE_VAL(ac_cv_uint,
  [AC_TRY_COMPILE([#include <stdio.h>
                   #include <sys/types.h>],
                  [uint foo = 0;],
                  [ac_cv_uint=true],
                  [ac_cv_uint=false])])
 if test "$ac_cv_uint" = true ; then
@@ -3039,29 +2976,16 @@ AC_CACHE_VAL(ac_cv_uint_t,
                  [ac_cv_uint_t=true],
                  [ac_cv_uint_t=false])])
 if test "$ac_cv_uint_t" = true ; then
   AC_DEFINE(HAVE_UINT_T)
   AC_MSG_RESULT(yes)
 else
   AC_MSG_RESULT(no)
 fi
-AC_MSG_CHECKING(for uint16_t)
-AC_CACHE_VAL(ac_cv_uint16_t,
- [AC_TRY_COMPILE([#include <stdio.h>
-                  #include <sys/types.h>],
-                 [uint16_t foo = 0;],
-                 [ac_cv_uint16_t=true],
-                 [ac_cv_uint16_t=false])])
-if test "$ac_cv_uint16_t" = true ; then
-  AC_DEFINE(HAVE_UINT16_T)
-  AC_MSG_RESULT(yes)
-else
-  AC_MSG_RESULT(no)
-fi
 
 dnl On the gcc trunk (as of 2001-02-09) _GNU_SOURCE, and thus __USE_GNU,
 dnl are defined when compiling C++ but not C.  Since the result of this
 dnl test is used only in C++, do it in C++.
 AC_LANG_CPLUSPLUS
 
 AC_MSG_CHECKING(for uname.domainname)
 AC_CACHE_VAL(ac_cv_have_uname_domainname_field,

--- a/js/src/js-config.h.in
+++ b/js/src/js-config.h.in
@@ -50,20 +50,16 @@
 
 /* Define to 1 if SpiderMonkey should include ctypes support.  */
 #undef JS_HAS_CTYPES
 
 /* Define to 1 if SpiderMonkey should support the ability to perform
    entirely too much GC.  */
 #undef JS_GC_ZEAL
 
-/* Define to 1 if the standard <stdint.h> header is present and
-   useable.  See jstypes.h and jsstdint.h.  */
-#undef JS_HAVE_STDINT_H
-
 /* Define to 1 if the <endian.h> header is present and
    useable.  See jscpucfg.h.  */
 #undef JS_HAVE_ENDIAN_H
 
 /* Define to 1 if the <sys/isa_defs.h> header is present and
    useable.  See jscpucfg.h.  */
 #undef JS_HAVE_SYS_ISA_DEFS_H
 

--- a/js/src/jsinttypes.h
+++ b/js/src/jsinttypes.h
@@ -34,105 +34,41 @@
  *
  * ***** END LICENSE BLOCK ***** */
 
 #ifndef jsinttypes_h___
 #define jsinttypes_h___
 
 #include "js-config.h"
 
+#include "mozilla/StdInt.h"
+
 /*
  * Types:
  *   JSInt<N>, JSUint<N> (for <N> = 8, 16, 32, and 64)
  *   JSIntPtr, JSUIntPtr
  *
  * JSInt<N> and JSUint<N> are signed and unsigned types known to be
  * <N> bits long.  Note that neither JSInt8 nor JSUInt8 is necessarily
  * equivalent to a plain "char".
  *
  * JSIntPtr and JSUintPtr are signed and unsigned types capable of
  * holding an object pointer.
  *
- * Use these types in public SpiderMonkey header files, not the
- * corresponding types from the C standard <stdint.h> header.  Windows
- * doesn't support <stdint.h>, and Microsoft says it has no plans to
- * do so in the future; this means that projects that embed
- * SpiderMonkey often take matters into their own hands and define the
- * standard types themselves.  If we define them in our public
- * headers, our definitions may conflict with embedders' (see bug
- * 479258).  The JS* types are in our namespace, and can be used
- * without troubling anyone.
- *
- * Internal SpiderMonkey code wishing to use the type names ISO C
- * defines in the standard header <stdint.h> can #include
- * "jsstdint.h", which provides those types regardless of whether
- * <stdint.h> itself is available.
+ * These typedefs were once necessary to support platforms without a working
+ * <stdint.h> (i.e. MSVC++ prior to 2010).  Now that we ship a custom <stdint.h>
+ * for such compilers, they are no longer necessary and will likely be shortly
+ * removed.
  */
 
-#if defined(JS_HAVE_STDINT_H) || \
-    defined(JS_SYS_TYPES_H_DEFINES_EXACT_SIZE_TYPES)
-
-#if defined(JS_HAVE_STDINT_H)
-#include <stdint.h>
-#else
-#include <sys/types.h>
-#endif
-
 typedef int8_t   JSInt8;
 typedef int16_t  JSInt16;
 typedef int32_t  JSInt32;
 typedef int64_t  JSInt64;
 typedef intptr_t JSIntPtr;
 
 typedef uint8_t   JSUint8;
 typedef uint16_t  JSUint16;
 typedef uint32_t  JSUint32;
 typedef uint64_t  JSUint64;
 typedef uintptr_t JSUintPtr;
 
-#else
-
-#if defined(JS_HAVE___INTN)
-
-typedef __int8  JSInt8;
-typedef __int16 JSInt16;
-typedef __int32 JSInt32;
-typedef __int64 JSInt64;
-
-typedef unsigned __int8 JSUint8;
-typedef unsigned __int16 JSUint16;
-typedef unsigned __int32 JSUint32;
-typedef unsigned __int64 JSUint64;
-
-#elif defined(JS_INT8_TYPE)
-
-typedef signed JS_INT8_TYPE   JSInt8;
-typedef signed JS_INT16_TYPE  JSInt16;
-typedef signed JS_INT32_TYPE  JSInt32;
-typedef signed JS_INT64_TYPE  JSInt64;
-
-typedef unsigned JS_INT8_TYPE   JSUint8;
-typedef unsigned JS_INT16_TYPE  JSUint16;
-typedef unsigned JS_INT32_TYPE  JSUint32;
-typedef unsigned JS_INT64_TYPE  JSUint64;
-
-#else
-#error "couldn't find exact-width integer types"
-#endif
-
-/* Microsoft Visual C/C++ defines intptr_t and uintptr_t in <stddef.h>.  */
-#if defined(JS_STDDEF_H_HAS_INTPTR_T)
-#include <stddef.h>
-typedef intptr_t JSIntPtr;
-typedef uintptr_t JSUintPtr;
-
-/* Failing that, the configure script will have found something.  */
-#elif defined(JS_INTPTR_TYPE)
-typedef signed   JS_INTPTR_TYPE JSIntPtr;
-typedef unsigned JS_INTPTR_TYPE JSUintPtr;
-
-#else
-#error "couldn't find pointer-sized integer types"
-#endif
-
-#endif /* JS_HAVE_STDINT_H */
-
 #endif /* jsinttypes_h___ */

--- a/js/src/jsnum.cpp
+++ b/js/src/jsnum.cpp
@@ -81,43 +81,16 @@
 #include "jsstrinlines.h"
 
 #include "vm/NumberObject-inl.h"
 #include "vm/String-inl.h"
 
 using namespace js;
 using namespace js::types;
 
-#ifndef JS_HAVE_STDINT_H /* Native support is innocent until proven guilty. */
-
-JS_STATIC_ASSERT(uint8_t(-1) == UINT8_MAX);
-JS_STATIC_ASSERT(uint16_t(-1) == UINT16_MAX);
-JS_STATIC_ASSERT(uint32_t(-1) == UINT32_MAX);
-JS_STATIC_ASSERT(uint64_t(-1) == UINT64_MAX);
-
-JS_STATIC_ASSERT(INT8_MAX > INT8_MIN);
-JS_STATIC_ASSERT(uint8_t(INT8_MAX) + uint8_t(1) == uint8_t(INT8_MIN));
-JS_STATIC_ASSERT(INT16_MAX > INT16_MIN);
-JS_STATIC_ASSERT(uint16_t(INT16_MAX) + uint16_t(1) == uint16_t(INT16_MIN));
-JS_STATIC_ASSERT(INT32_MAX > INT32_MIN);
-JS_STATIC_ASSERT(uint32_t(INT32_MAX) + uint32_t(1) == uint32_t(INT32_MIN));
-JS_STATIC_ASSERT(INT64_MAX > INT64_MIN);
-JS_STATIC_ASSERT(uint64_t(INT64_MAX) + uint64_t(1) == uint64_t(INT64_MIN));
-
-JS_STATIC_ASSERT(INTPTR_MAX > INTPTR_MIN);
-JS_STATIC_ASSERT(uintptr_t(INTPTR_MAX) + uintptr_t(1) == uintptr_t(INTPTR_MIN));
-JS_STATIC_ASSERT(uintptr_t(-1) == UINTPTR_MAX);
-JS_STATIC_ASSERT(size_t(-1) == SIZE_MAX);
-JS_STATIC_ASSERT(PTRDIFF_MAX > PTRDIFF_MIN);
-JS_STATIC_ASSERT(ptrdiff_t(PTRDIFF_MAX) == PTRDIFF_MAX);
-JS_STATIC_ASSERT(ptrdiff_t(PTRDIFF_MIN) == PTRDIFF_MIN);
-JS_STATIC_ASSERT(uintptr_t(PTRDIFF_MAX) + uintptr_t(1) == uintptr_t(PTRDIFF_MIN));
-
-#endif /* JS_HAVE_STDINT_H */
-
 /*
  * If we're accumulating a decimal number and the number is >= 2^53, then the
  * fast result from the loop in GetPrefixInteger may be inaccurate. Call
  * js_strtod_harder to get the correct answer.
  */
 static bool
 ComputeAccurateDecimalInteger(JSContext *cx, const jschar *start, const jschar *end, jsdouble *dp)
 {

--- a/js/src/jsstdint.h
+++ b/js/src/jsstdint.h
@@ -33,90 +33,17 @@
  * decision by deleting the provisions above and replace them with the notice
  * and other provisions required by the GPL or the LGPL. If you do not delete
  * the provisions above, a recipient may use your version of this file under
  * the terms of any one of the MPL, the GPL or the LGPL.
  *
  * ***** END LICENSE BLOCK ***** */
 
 /*
- * This header provides definitions for the <stdint.h> types we use,
- * even on systems that lack <stdint.h>.
- *
- * NOTE: This header should only be included in private SpiderMonkey
- * code; public headers should use only the JS{Int,Uint}N types; see
- * the comment for them in "jsinttypes.h".
- *
- * At the moment, these types are not widely used within SpiderMonkey;
- * this file is meant to make existing uses portable, and to allow us
- * to transition portably to using them more, if desired.
+ * This header implements the functionality of <stdint.h>, even on systems that
+ * lack it.  It does so by completely delegating to a separate header, which
+ * could just as easily be used.  However, as this header is part of the
+ * SpiderMonkey interface, we retain it for compatibility.
  */
-
 #ifndef jsstdint_h___
 #define jsstdint_h___
-
-#include "jsinttypes.h"
-
-/* If we have a working stdint.h, then jsinttypes.h has already
-   defined the standard integer types.  Otherwise, define the standard
-   names in terms of the 'JS' types.  */
-#if ! defined(JS_HAVE_STDINT_H) && \
-    ! defined(JS_SYS_TYPES_H_DEFINES_EXACT_SIZE_TYPES)
-
-typedef JSInt8  int8_t;
-typedef JSInt16 int16_t;
-typedef JSInt32 int32_t;
-typedef JSInt64 int64_t;
-
-typedef JSUint8  uint8_t;
-typedef JSUint16 uint16_t;
-typedef JSUint32 uint32_t;
-typedef JSUint64 uint64_t;
-
-/* Suppress other, conflicting attempts to define stdint-bits. */
-#define _STDINT_H
-
-/* If JS_STDDEF_H_HAS_INTPTR_T or JS_CRTDEFS_H_HAS_INTPTR_T are
-   defined, then jsinttypes.h included the given header, which
-   introduced definitions for intptr_t and uintptr_t.  Otherwise,
-   define the standard names in terms of the 'JS' types.  */
-#if !defined(JS_STDDEF_H_HAS_INTPTR_T) && !defined(JS_CRTDEFS_H_HAS_INTPTR_T)
-typedef JSIntPtr  intptr_t;
-typedef JSUintPtr uintptr_t;
-#endif
-
-#if !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS)
-
-#define INT8_MAX  127
-#define INT8_MIN  (-INT8_MAX - 1)
-#define INT16_MAX 32767
-#define INT16_MIN (-INT16_MAX - 1)
-#define INT32_MAX 2147483647
-#define INT32_MIN (-INT32_MAX - 1)
-#define INT64_MAX 9223372036854775807LL
-#define INT64_MIN (-INT64_MAX - 1)
-
-#define UINT8_MAX  255
-#define UINT16_MAX 65535
-#define UINT32_MAX 4294967295U
-#define UINT64_MAX 18446744073709551615ULL
-
-/*
- * These are technically wrong as they can't be used in the preprocessor, but
- * we would require compiler assistance, and at the moment we don't need
- * preprocessor-correctness.
- */
-#ifdef _MSC_VER
-#undef SIZE_MAX
-#endif
-
-#define INTPTR_MAX  ((intptr_t) (UINTPTR_MAX >> 1))
-#define INTPTR_MIN  (intptr_t(uintptr_t(INTPTR_MAX) + uintptr_t(1)))
-#define UINTPTR_MAX ((uintptr_t) -1)
-#define SIZE_MAX UINTPTR_MAX
-#define PTRDIFF_MAX INTPTR_MAX
-#define PTRDIFF_MIN INTPTR_MIN
-
-#endif /* !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS) */
-
-#endif /* JS_HAVE_STDINT_H */
-
+#include "mozilla/StdInt.h"
 #endif /* jsstdint_h___ */

new file mode 100644
--- /dev/null
+++ b/mfbt/StdInt.h
@@ -0,0 +1,73 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sw=4 et tw=99 ft=cpp:
+ *
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at:
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Code.
+ *
+ * The Initial Developer of the Original Code is
+ *   The Mozilla Foundation
+ * Portions created by the Initial Developer are Copyright (C) 2011
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Jeff Walden <jwalden+code@mit.edu> (original author)
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+/* Implements the C99 <stdint.h> interface for C and C++ code. */
+
+#ifndef mozilla_StdInt_h_
+#define mozilla_StdInt_h_
+
+/*
+ * The C99 standard header <stdint.h> exposes typedefs for common fixed-width
+ * integer types.  It would be feasible to simply #include <stdint.h>, but
+ * MSVC++ versions prior to 2010 don't provide <stdint.h>.  We could solve this
+ * by reimplementing <stdint.h> for MSVC++ 2008 and earlier.  But then we reach
+ * a second problem: our custom <stdint.h> might conflict with a <stdint.h>
+ * defined by an embedder already looking to work around the MSVC++ <stdint.h>
+ * absence.
+ *
+ * We address these issues in this manner:
+ *
+ *   1. If the preprocessor macro MOZ_CUSTOM_STDINT_H is defined to a path to a
+ *      custom <stdint.h> implementation, we will #include it.  Embedders using
+ *      a custom <stdint.h> must define this macro to an implementation that
+ *      will work with their embedding.
+ *   2. Otherwise, if we are compiling with a an MSVC++ version without
+ *      <stdint.h>, #include our custom <stdint.h> reimplementation.
+ *   3. Otherwise, #include the standard <stdint.h> provided by the compiler.
+ */
+#if defined(MOZ_CUSTOM_STDINT_H)
+#  include MOZ_CUSTOM_STDINT_H
+#elif defined(_MSC_VER) && _MSC_VER < 1600
+#  include "mozilla/MSStdInt.h"
+#else
+#  include <stdint.h>
+#endif
+
+#endif  /* mozilla_StdInt_h_ */

--- a/mfbt/Types.h
+++ b/mfbt/Types.h
@@ -40,42 +40,38 @@
 /*
  * NB: This header must be both valid C and C++.  It must be
  * include-able by code embedding SpiderMonkey *and* Gecko.
  */
 
 #ifndef mozilla_Types_h_
 #define mozilla_Types_h_
 
+/*
+ * Expose the standard integer types from <stdint.h> (and the integer type
+ * limit and constant macros, if the right __STDC_*_MACRO has been defined for
+ * each).  These are all usable throughout mfbt code, and throughout Mozilla
+ * code more generally.
+ */
+#include "mozilla/StdInt.h"
+
 /* 
  * mfbt is logically "lower level" than js/src, but needs basic
  * definitions of numerical types and macros for compiler/linker
  * directives.  js/src already goes through some pain to provide them
  * on numerous platforms, so instead of moving all that goop here,
  * this header makes use of the fact that for the foreseeable future
  * mfbt code will be part and parcel with libmozjs, static or not.
  *
  * For now, the policy is to use jstypes definitions but add a layer
  * of indirection on top of them in case a Great Refactoring ever
  * happens.
  */
 #include "jstypes.h"
 
-/*
- * The numerical types provided by jstypes.h that are allowed within
- * mfbt code are
- *
- *   stddef types:  size_t, ptrdiff_t, etc.
- *   stdin [sic] types:  int8, uint32, etc.
- *
- * stdint types (int8_t etc.), are available for use here, but doing
- * so would change SpiderMonkey's and Gecko's contracts with
- * embedders: stdint types have not yet appeared in public APIs.
- */
-
 #define MOZ_EXPORT_API(type_)  JS_EXPORT_API(type_)
 #define MOZ_IMPORT_API(type_)  JS_IMPORT_API(type_)
 
 /*
  * mfbt definitions need to see export declarations when built, but
  * other code needs to see import declarations when using mfbt.
  */
 #if defined(IMPL_MFBT)

--- a/widget/src/gtk2/nsWindow.cpp
+++ b/widget/src/gtk2/nsWindow.cpp
@@ -137,16 +137,17 @@ static const char sGconfAccessibilityKey
 #include <wchar.h>
 #include "imgIContainer.h"
 #include "nsGfxCIID.h"
 #include "nsImageToPixbuf.h"
 #include "nsIInterfaceRequestorUtils.h"
 #include "nsAutoPtr.h"
 
 extern "C" {
+#define PIXMAN_DONT_DEFINE_STDINT
 #include "pixman.h"
 }
 #include "gfxPlatformGtk.h"
 #include "gfxContext.h"
 #include "gfxImageSurface.h"
 #include "gfxUtils.h"
 #include "Layers.h"
 #include "LayerManagerOGL.h"

--- a/widget/src/qt/nsWindow.cpp
+++ b/widget/src/qt/nsWindow.cpp
@@ -145,16 +145,17 @@ static Atom sPluginIMEAtom = nsnull;
 #include "nsFastStartupQt.h"
 
 // If embedding clients want to create widget without real parent window
 // then nsIBaseWindow->Init() should have parent argument equal to PARENTLESS_WIDGET
 #define PARENTLESS_WIDGET (void*)0x13579
 
 #include "nsShmImage.h"
 extern "C" {
+#define PIXMAN_DONT_DEFINE_STDINT
 #include "pixman.h"
 }
 
 using namespace mozilla;
 using namespace mozilla::widget;
 
 // imported in nsWidgetFactory.cpp
 bool gDisableNativeTheme = false;

--- a/widget/src/windows/nsWindowGfx.cpp
+++ b/widget/src/windows/nsWindowGfx.cpp
@@ -74,16 +74,17 @@ using mozilla::plugins::PluginInstancePa
 #ifdef MOZ_ENABLE_D3D10_LAYER
 #include "LayerManagerD3D10.h"
 #endif
 
 #include "nsUXThemeData.h"
 #include "nsUXThemeConstants.h"
 
 extern "C" {
+#define PIXMAN_DONT_DEFINE_STDINT
 #include "pixman.h"
 }
 
 using namespace mozilla::layers;
 
 /**************************************************************
  **************************************************************
  **