Implement blacklist's force GPU capability in dual GPU machines.

content/content_common.gypi

 # 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../build/temp_gyp/googleurl.gyp:googleurl',
     '../media/media.gyp:media',
     '../net/net.gyp:net',
@@ skipping 34 matching lines @@
     'public/common/frame_navigate_params.cc',
     'public/common/frame_navigate_params.h',
     'public/common/geoposition.cc',
     'public/common/geoposition.h',
     'public/common/gpu_feature_type.h',
     'public/common/gpu_info.cc',
     'public/common/gpu_info.h',
     'public/common/gpu_memory_stats.cc',
     'public/common/gpu_memory_stats.h',
     'public/common/gpu_performance_stats.h',
+    'public/common/gpu_switching_option.h',
     'public/common/injection_test_mac.h',
     'public/common/injection_test_win.h',
     'public/common/javascript_message_type.h',
     'public/common/main_function_params.h',
     'public/common/media_stream_request.cc',
     'public/common/media_stream_request.h',
     'public/common/page_transition_types.cc',
     'public/common/page_transition_types.h',
     'public/common/page_type.h',
     'public/common/page_zoom.h',
@@ skipping 481 matching lines @@
         '../build/extract_from_cab.py',
         '..\\third_party\\directxsdk\\files\\Redist\\<(input)',
         '<(output)',
         '<(PRODUCT_DIR)',
         ],
       },
      ]
     }],
   ],
 }