gfx: Create a separate gfx component out of ui.

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.
 
 {
   'conditions': [
     ['enable_plugins==1', {
       'dependencies': [
         '../base/base.gyp:base',
         '../ppapi/ppapi_internal.gyp:ppapi_ipc',
+        '../ui/gfx/gfx.gyp:gfx',
         '../ui/ui.gyp:ui',
       ],
       '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',
         'ppapi_plugin/ppapi_plugin_main.cc',
         'ppapi_plugin/ppapi_thread.cc',
         'ppapi_plugin/ppapi_thread.h',
         'ppapi_plugin/ppapi_webkitplatformsupport_impl.cc',
         'ppapi_plugin/ppapi_webkitplatformsupport_impl.h',
       ],
       'include_dirs': [
         '..',
       ],
     }],
   ],
 }