Code coverage on Windows

build/common.gypi

 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     # .gyp files should set chromium_code to 1 if they build Chromium-specific
     # code, as opposed to external code.  This variable is used to control
     # such things as the set of warnings to enable, and whether warnings are
     # treated as errors.
@@ skipping 48 matching lines @@
 
     # The architecture that we're building on.
     'target_arch%': 'ia32',
 
     # By default linux does not use views. To turn on views in Linux
     # set the variable GYP_DEFINES to "toolkit_views=1", or modify
     # ~/.gyp/include.gypi .
     'toolkit_views%': 0,
 
     'linux2%': 0,
-    
+
     'chrome_personalization%': 0,
   },
   'target_defaults': {
     'conditions': [
       ['branding=="Chrome"', {
         'defines': ['GOOGLE_CHROME_BUILD'],
         'conditions': [
           ['OS=="linux"', {
             'cflags': [ '-gstabs' ],
           }],
@@ skipping 26 matching lines @@
             ],
           }],
           # Linux gyp (into scons) doesn't like target_conditions?
           # TODO(???): track down why 'target_conditions' doesn't work
           # on Linux gyp into scons like it does on Mac gyp into xcodeproj.
           ['OS=="linux"', {
             'cflags': [ '-ftest-coverage',
                         '-fprofile-arcs' ],
             'link_settings': { 'libraries': [ '-lgcov' ] },
           }],
-        ]},
-      # TODO(jrg): options for code coverage on Windows
-      ],
-    ],
+          # Finally, for Windows, we simply turn on profiling.
+          ['OS=="win"', {
+            'msvs_settings': {
+              'VCLinkerTool': {
+                'Profile': 'true',
+              },
+              'VCCLCompilerTool': {
+                # /Z7, not /Zi, so coverage is happy
+                'DebugInformationFormat': '1',
+                'AdditionalOptions': '/Yd',
+              }
+            }
+         }],  # OS==win
+        ],  # conditions for coverage
+      }],  # coverage!=0
+    ],  # conditions for 'target_defaults'
     'default_configuration': 'Debug',
     'configurations': {
        # VCLinkerTool LinkIncremental values below:
        #   0 == default
        #   1 == /INCREMENTAL:NO
        #   2 == /INCREMENTAL
        # Debug links incremental, Release does not.
       'Debug': {
         'conditions': [
           [ 'OS=="mac"', {
@@ skipping 409 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }