Enable /PROFILE for Release builds and remove it from Debug builds.

build/common.gypi

Index: build/common.gypi
===================================================================
--- build/common.gypi	(revision 95783)
+++ build/common.gypi	(working copy)
@@ -1154,7 +1154,16 @@
             ],
           },
           'VCLinkerTool': {
+            # LinkIncremental is a tri-state boolean, where 0 means default

[M-A Ruel, 2011/08/08 15:21:17]

"tri-state variable"

It's _not_ a boolean. :)

+            # (i.e., inherit from parent solution), 1 means false, and
+            # 2 means true.
             'LinkIncremental': '1',
+            # This corresponds to the /PROFILE flag which ensures the PDB
+            # file contains FIXUP information (growing the PDB file by about
+            # 5%) but does not otherwise alter the output binary. This
+            # information is used by the Syzygy optimization tool when
+            # decomposing the release image.
+            'Profile': 'true',
           },
         },
         'conditions': [