clang/win: Fix warnings to prepare for building without -Wno-reorder.

testing/gtest.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.
 
 {
   'includes': [
     'gtest.gypi',
   ],
   'targets': [
     {
@@ skipping 173 matching lines @@
               ['OS=="win"', {
                 'run_as': {
                   'action????': ['$(TargetPath)', '--gtest_print_time'],
                 },
               }],
             ],
           }],
         ],
         'msvs_disabled_warnings': [4800],
       },
+      'variables': {
+        'clang_warning_flags': [
+          # The Mutex constructor initializer list in gtest-port.cc is
+          # incorrectly ordered.

[Nico, 2015/06/30 18:03:50]

Can you file an upstream bug for this and link to it in this comment?

[Sam McNally, 2015/07/02 00:12:13]

Done.

+          '-Wno-reorder',
+        ]
+      },
     },
     {
       'target_name': 'gtest_main',
       'type': 'static_library',
       'dependencies': [
         'gtest',
       ],
       'sources': [
         'gtest/src/gtest_main.cc',
       ],
     },
     {
       'target_name': 'gtest_prod',
       'toolsets': ['host', 'target'],
       'type': 'none',
       'sources': [
         'gtest/include/gtest/gtest_prod.h',
       ],
     },
   ],
 }