--- a/db/sqlite3/src/Makefile.in
+++ b/db/sqlite3/src/Makefile.in
@@ -71,19 +71,16 @@ sqlite-version.h: sqlite-version.py sqli
 $(DEFFILE): sqlite.def
 	@$(PYTHON) $(topsrcdir)/config/Preprocessor.py $(DEFINES) \
 	  $(srcdir)/sqlite.def > $(DEFFILE)
 
 export:: sqlite-version.h
 endif
 endif
 
-# FIXME: bug 419893
-NO_PROFILE_GUIDED_OPTIMIZE = 1
-
 ifdef GNU_CC
 MODULE_OPTIMIZE_FLAGS = -O2
 else
 ifeq ($(OS_ARCH),SunOS)
 MODULE_OPTIMIZE_FLAGS = -xO5
 endif
 ifeq ($(OS_ARCH),WINNT)
 MODULE_OPTIMIZE_FLAGS = -O2

--- a/storage/src/Makefile.in
+++ b/storage/src/Makefile.in
@@ -38,19 +38,16 @@
 
 DEPTH   = ../..
 topsrcdir = @top_srcdir@
 srcdir    = @srcdir@
 VPATH   = @srcdir@
 
 include $(DEPTH)/config/autoconf.mk
 
-# FIXME: bug 419893
-NO_PROFILE_GUIDED_OPTIMIZE = 1
-
 MODULE           = storage
 LIBRARY_NAME     = storage_s
 MODULE_NAME      = mozStorageModule
 FORCE_STATIC_LIB = 1
 GRE_MODULE       = 1
 LIBXUL_LIBRARY = 1
 
 

--- a/toolkit/components/places/src/Makefile.in
+++ b/toolkit/components/places/src/Makefile.in
@@ -38,19 +38,16 @@
 
 DEPTH = ../../../..
 topsrcdir = @top_srcdir@
 srcdir = @srcdir@
 VPATH = @srcdir@
 
 include $(DEPTH)/config/autoconf.mk
 
-# FIXME: bug 419893
-NO_PROFILE_GUIDED_OPTIMIZE = 1
-
 MODULE = places
 LIBRARY_NAME  = places
 LIBXUL_LIBRARY = 1
 EXPORT_LIBRARY = 1
 MODULE_NAME = nsPlacesModule
 IS_COMPONENT = 1