Committing http://codereview.chromium.org/7222014/ for Chris Hamilton.

build/internal/release_impl_official.gypi

Index: build/internal/release_impl_official.gypi
===================================================================
--- build/internal/release_impl_official.gypi	(revision 89885)
+++ build/internal/release_impl_official.gypi	(working copy)
@@ -16,6 +16,12 @@
     },
     'VCLinkerTool': {
       'LinkTimeCodeGeneration': '1',
+      # The /PROFILE flag causes the linker to add a "FIXUP" debug stream to
+      # the generated PDB. According to MSDN documentation, this flag is only
+      # available (or perhaps supported) in the Enterprise (team development)
+      # version of Visual Studio. If this blocks your official build, simply
+      # comment out this line, then re-run "gclient runhooks".
+      'Profile': 'true',
     },
   },
 }