win: Don't omit frame pointers

build/common.gypi

 # Copyright 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': {
     'variables': {
       'clang%': 0,
       'conditions': [
         ['OS=="mac"', {
@@ skipping 162 matching lines @@
         },
         'msvs_settings': {
           'VCCLCompilerTool': {
             'WarningLevel': '4',
             'WarnAsError': 'true',
             'DebugInformationFormat': '3',
             'ExceptionHandling': '0',
             'RuntimeTypeInfo': 'false',
             'BufferSecurityCheck': 'true',
             'EnableFunctionLevelLinking': 'true',
+            'OmitFramePointers': 'false',
+            # The above is not sufficient (http://crbug.com/106711): it simply
+            # eliminates an explicit "/Oy", but both /O2 and /Ox perform FPO
+            # regardless, so we must explicitly disable. We still want the false
+            # setting above to avoid having "/Oy /Oy-" and warnings about
+            # overriding.
+            'AdditionalOptions': ['/Oy-'],
           },
           'VCLinkerTool': {
             'GenerateDebugInformation': 'true',
             'SubSystem': '1',
           },
         },
         'msvs_disabled_warnings': [
           4100,  # Unreferenced formal parameter.
           4127,  # Conditional expression is constant.
           4201,  # Nonstandard extension used : nameless struct/union.
@@ skipping 85 matching lines @@
                 ],
               }],
             ],
 
           }],
 
           ['OS=="win"', {
             'msvs_settings': {
               'VCCLCompilerTool': {
                 'Optimization': '3',
+                'AdditionalOptions': [
+                  '/Zo',  # Improve debugging optimized builds.
+                ],
               },
             },
           }],
 
         ],
       },
       'Debug': {
         'conditions': [
 
           ['OS=="mac"', {
@@ skipping 36 matching lines @@
   },
 
   'conditions': [
     ['OS=="mac"', {
       'xcode_settings': {
         'SYMROOT': '<(DEPTH)/xcodebuild',
       },
     }],
   ],
 }