Use precompiled headers for most large projects.

content/content_ppapi_plugin.gypi

 # Copyright (c) 2011 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': 'content_ppapi_plugin',
       'type': 'static_library',
+      'msvs_disable_precompiled_header': '1',
       'dependencies': [
         '../base/base.gyp:base',
         '../ppapi/ppapi_internal.gyp:ppapi_proxy',
       ],
       'sources': [
         'ppapi_plugin/broker_process_dispatcher.cc',
         'ppapi_plugin/broker_process_dispatcher.h',
         'ppapi_plugin/plugin_process_dispatcher.cc',
         'ppapi_plugin/plugin_process_dispatcher.h',
         'ppapi_plugin/ppapi_broker_main.cc',
@@ skipping 13 matching lines @@
           'link_settings': {
             'mac_bundle_resources': [
               'ppapi_plugin/ppapi.sb',
             ],
           },
         }],
       ],
     },
   ],
 }