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

ui/gl/gl_context_mac.mm

 // 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.
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
 #include "base/memory/scoped_generic_obj.h"
 #include "base/memory/scoped_ptr.h"
 #include "third_party/mesa/MesaLib/include/GL/osmesa.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context_cgl.h"
 #include "ui/gl/gl_context_osmesa.h"
 #include "ui/gl/gl_context_stub.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/gl_switches.h"
+#include "ui/gl/gpu_switching_manager.h"
 
 #if defined(USE_AURA)
 #include "ui/gl/gl_context_nsview.h"
 #endif
 
 namespace {
 
 // ScopedGenericObj functor for CGLDestroyRendererInfo().
 class ScopedDestroyRendererInfo {
  public:
@@ skipping 133 matching lines @@
 
     const int kMacBookProFirstDualAMDIntelGPUModel = 8;
 
     bool forcibly_disable =
         ((model == "MacBookPro") &&
          (model_major < kMacBookProFirstDualAMDIntelGPUModel)) ||
         CommandLine::ForCurrentProcess()->HasSwitch(
             switches::kDisableGpuSwitching);
 
     if (forcibly_disable) {
-      GLContextCGL::ForceUseOfDiscreteGPU();
+      GpuSwitchingManager::GetInstance()->ForceUseOfDiscreteGpu();
       return false;
     }
 
     supports_dual_gpus = true;
   }
 
   return supports_dual_gpus;
 }
 
 }  // namespace gfx