enable -Wstring-conversion when compiling with clang

skia/skia.gyp

 # Copyright (c) 2012 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.
 
 {
   'targets': [
     {
       'target_name': 'skia',
       'type': '<(component)',
       'variables': {
@@ skipping 521 matching lines @@
           'dependencies': [
             '../base/base.gyp:base',
           ],
           'direct_dependent_settings': {
             'defines': [
               'GR_DLL',
               'SKIA_DLL',
             ],
           },
         }],
+        # TODO(scottmg): http://crbug.com/177306
+        ['clang==1', {
+          'xcode_settings': {
+            'WARNING_CFLAGS!': [
+              # Don't warn about string->bool used in asserts.
+              '-Wstring-conversion',
+            ],
+          },
+          'cflags!': [
+            '-Wstring-conversion',
+          ],
+        }],
       ],
       'dependencies': [
         'skia_opts',
         '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../third_party/sfntly/sfntly.gyp:sfntly',
         '../third_party/zlib/zlib.gyp:zlib',
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           'config',
@@ skipping 285 matching lines @@
           'sources': [
             '../third_party/skia/src/opts/SkBitmapProcState_opts_none.cpp',
             '../third_party/skia/src/opts/SkBlitRow_opts_none.cpp',
             '../third_party/skia/src/opts/SkUtils_opts_none.cpp',
           ],
         },
       ],
     }],
   ],
 }