Add the /profile flag to linker options for official builds.

build/internal/release_impl_official.gypi

 {
   'includes': ['release_defaults.gypi'],
   'defines': ['OFFICIAL_BUILD'],
   'msvs_settings': {
     'VCCLCompilerTool': {
       'Optimization': '3',
       'InlineFunctionExpansion': '2',
       'EnableIntrinsicFunctions': 'true',
       'FavorSizeOrSpeed': '2',
       'OmitFramePointers': 'true',
       'EnableFiberSafeOptimizations': 'true',
       'WholeProgramOptimization': 'true',
     },
     'VCLibrarianTool': {
       'AdditionalOptions': ['/ltcg', '/expectedoutputsize:120000000'],
     },
     'VCLinkerTool': {
       'LinkTimeCodeGeneration': '1',
+      # The /profile flag causes the linker to add a "FIXUP"
+      # debug stream to the generated PDB.
+      'Profile': 'true',

[M-A Ruel, 2011/06/02 13:23:02]

Add a comment along the lines:
# /PROFILE is only available only in Enterprise (team development) versions.
Simply comment out that line if you have a lower version and what do to an
official build.

[Sigurður Ásgeirsson, 2011/06/02 13:33:46]

Done.

     },
   },
 }