--- a/media/webrtc/trunk/build/common.gypi
+++ b/media/webrtc/trunk/build/common.gypi
@@ -903,53 +903,53 @@
     # we can build a debug version with acceptable size and performance.
     'android_full_debug%': 0,
 
     # Sets the default version name and code for Android app, by default we
     # do a developer build.
     'android_app_version_name%': 'Developer Build',
     'android_app_version_code%': 0,
 
-    'sas_dll_exists': '<!(python <(DEPTH)/build/dir_exists.py <(sas_dll_path))',
-    'wix_exists': '<!(python <(DEPTH)/build/dir_exists.py <(wix_path))',
+    'sas_dll_exists': '<!(<(PYTHON) <(DEPTH)/build/dir_exists.py <(sas_dll_path))',
+    'wix_exists': '<!(<(PYTHON) <(DEPTH)/build/dir_exists.py <(wix_path))',
 
     'windows_sdk_default_path': '<(DEPTH)/third_party/platformsdk_win8/files',
     'directx_sdk_default_path': '<(DEPTH)/third_party/directxsdk/files',
 
     'conditions': [
-      ['OS=="win" and "<!(python <(DEPTH)/build/dir_exists.py <(windows_sdk_default_path))"=="True"', {
+      ['OS=="win" and "<!(<(PYTHON) <(DEPTH)/build/dir_exists.py <(windows_sdk_default_path))"=="True"', {
         'windows_sdk_path%': '<(windows_sdk_default_path)',
       }, {
         'windows_sdk_path%': 'C:/Program Files (x86)/Windows Kits/8.0',
       }],
-      ['OS=="win" and "<!(python <(DEPTH)/build/dir_exists.py <(directx_sdk_default_path))"=="True"', {
+      ['OS=="win" and "<!(<(PYTHON) <(DEPTH)/build/dir_exists.py <(directx_sdk_default_path))"=="True"', {
         'directx_sdk_path%': '<(directx_sdk_default_path)',
       }, {
         'directx_sdk_path%': '$(DXSDK_DIR)',
       }],
       # If use_official_google_api_keys is already set (to 0 or 1), we
       # do none of the implicit checking.  If it is set to 1 and the
       # internal keys file is missing, the build will fail at compile
       # time.  If it is set to 0 and keys are not provided by other
       # means, a warning will be printed at compile time.
       ['use_official_google_api_keys==2', {
         'use_official_google_api_keys%':
-            '<!(python <(DEPTH)/google_apis/build/check_internal.py <(DEPTH)/google_apis/internal/google_chrome_api_keys.h)',
+            '<!(<(PYTHON) <(DEPTH)/google_apis/build/check_internal.py <(DEPTH)/google_apis/internal/google_chrome_api_keys.h)',
       }],
       ['os_posix==1 and OS!="mac" and OS!="ios"', {
         # Figure out the python architecture to decide if we build pyauto.
 	# disabled for mozilla because windows != mac and this runs a shell script
 	#        'python_arch%': '<!(<(DEPTH)/build/linux/python_arch.sh <(sysroot)/usr/<(system_libdir)/libpython<(python_ver).so.1.0)',
         'conditions': [
           # TODO(glider): set clang to 1 earlier for ASan and TSan builds so
           # that it takes effect here.
           # disabled for Mozilla since it doesn't use this, and 'msys' messes $(CXX) up
           ['build_with_mozilla==0 and clang==0 and asan==0 and tsan==0', {
             # This will set gcc_version to XY if you are running gcc X.Y.*.
-            'gcc_version%': '<!(python <(DEPTH)/build/compiler_version.py)',
+            'gcc_version%': '<!(<(PYTHON) <(DEPTH)/build/compiler_version.py)',
           }, {
             'gcc_version%': 0,
           }],
           ['branding=="Chrome"', {
             'linux_breakpad%': 1,
           }],
           # All Chrome builds have breakpad symbols, but only process the
           # symbols from official builds.
@@ -964,17 +964,17 @@
         'icu_use_data_file_flag%': 1,
         'use_system_bzip2%': 1,
         'use_system_libxml%': 1,
         'use_system_sqlite%': 1,
 
         # The Mac SDK is set for iOS builds and passed through to Mac
         # sub-builds. This allows the Mac sub-build SDK in an iOS build to be
         # overridden from the command line the same way it is for a Mac build.
-        'mac_sdk%': '<!(python <(DEPTH)/build/mac/find_sdk.py 10.6)',
+        'mac_sdk%': '<!(<(PYTHON) <(DEPTH)/build/mac/find_sdk.py 10.6)',
 
         # iOS SDK and deployment target support.  The iOS 5.0 SDK is actually
         # what is required, but the value is left blank so when it is set in
         # the project files it will be the "current" iOS SDK.  Forcing 5.0
         # even though it is "current" causes Xcode to spit out a warning for
         # every single project file for not using the "current" SDK.
         'ios_sdk%': '',
         'ios_sdk_path%': '',
@@ -1150,25 +1150,25 @@
           # these names into the build system.
           ['branding=="Chrome"', {
             'mac_product_name%': 'Google Chrome',
           }, { # else: branding!="Chrome"
             'mac_product_name%': 'Chromium',
           }],
 
           ['branding=="Chrome" and buildtype=="Official"', {
-            'mac_sdk%': '<!(python <(DEPTH)/build/mac/find_sdk.py --verify <(mac_sdk_min) --sdk_path=<(mac_sdk_path))',
+            'mac_sdk%': '<!(<(PYTHON) <(DEPTH)/build/mac/find_sdk.py --verify <(mac_sdk_min) --sdk_path=<(mac_sdk_path))',
             # Enable uploading crash dumps.
             'mac_breakpad_uploads%': 1,
             # Enable dumping symbols at build time for use by Mac Breakpad.
             'mac_breakpad%': 1,
             # Enable Keystone auto-update support.
             'mac_keystone%': 1,
           }, { # else: branding!="Chrome" or buildtype!="Official"
-            'mac_sdk%': '<!(python <(DEPTH)/build/mac/find_sdk.py <(mac_sdk_min))',
+            'mac_sdk%': '<!(<(PYTHON) <(DEPTH)/build/mac/find_sdk.py <(mac_sdk_min))',
             'mac_breakpad_uploads%': 0,
             'mac_breakpad%': 0,
             'mac_keystone%': 0,
           }],
         ],
       }],  # OS=="mac"
 
       ['OS=="win"', {

--- a/media/webrtc/trunk/tools/gyp/pylib/gyp/__init__.py
+++ b/media/webrtc/trunk/tools/gyp/pylib/gyp/__init__.py
@@ -63,16 +63,19 @@ def Load(build_files, format, default_va
 
   default_variables = copy.copy(default_variables)
 
   # Default variables provided by this program and its modules should be
   # named WITH_CAPITAL_LETTERS to provide a distinct "best practice" namespace,
   # avoiding collisions with user and automatic variables.
   default_variables['GENERATOR'] = format
 
+  # Provide a PYTHON value to run sub-commands with the same python
+  default_variables['PYTHON'] = sys.executable
+
   # Format can be a custom python file, or by default the name of a module
   # within gyp.generator.
   if format.endswith('.py'):
     generator_name = os.path.splitext(format)[0]
     path, generator_name = os.path.split(generator_name)
 
     # Make sure the path to the custom generator is in sys.path
     # Don't worry about removing it once we are done.  Keeping the path