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

content/gpu/gpu_main.cc

 // 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 <stdlib.h>
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include "base/debug/trace_event.h"
 #include "base/message_loop.h"
 #include "base/rand_util.h"
 #include "base/string_number_conversions.h"
 #include "base/stringprintf.h"
 #include "base/threading/platform_thread.h"
 #include "base/win/scoped_com_initializer.h"
 #include "build/build_config.h"
 #include "content/common/gpu/gpu_config.h"
 #include "content/gpu/gpu_child_thread.h"
 #include "content/gpu/gpu_info_collector.h"
 #include "content/gpu/gpu_process.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
+#include "content/public/common/gpu_switching_option.h"
 #include "content/public/common/main_function_params.h"
 #include "crypto/hmac.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/gl_switches.h"
+#include "ui/gl/gpu_switching_manager.h"
 
 #if defined(OS_WIN)
 #include "content/common/gpu/media/dxva_video_decode_accelerator.h"
 #include "sandbox/win/src/sandbox.h"
 #elif defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL)
 #include "content/common/gpu/media/omx_video_decode_accelerator.h"
 #elif defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY)
 #include "content/common/gpu/media/vaapi_video_decode_accelerator.h"
 #endif
 
@@ skipping 27 matching lines @@
     // able to load a DLL.
     SetErrorMode(
         SEM_FAILCRITICALERRORS |
         SEM_NOGPFAULTERRORBOX |
         SEM_NOOPENFILEERRORBOX);
 #elif defined(USE_X11)
     ui::SetDefaultX11ErrorHandlers();
 #endif
   }
 
+  if (command_line.HasSwitch(switches::kGpuSwitching)) {
+    std::string option = command_line.GetSwitchValueASCII(
+        switches::kGpuSwitching);
+    if (option == switches::kGpuSwitchingOptionNameForceDiscrete)
+      gfx::GpuSwitchingManager::GetInstance()->ForceUseOfDiscreteGpu();
+    else if (option == switches::kGpuSwitchingOptionNameForceIntegrated)
+      gfx::GpuSwitchingManager::GetInstance()->ForceUseOfIntegratedGpu();
+  }
+
   // Initialization of the OpenGL bindings may fail, in which case we
   // will need to tear down this process. However, we can not do so
   // safely until the IPC channel is set up, because the detection of
   // early return of a child process is implemented using an IPC
   // channel error. If the IPC channel is not fully set up between the
   // browser and GPU process, and the GPU process crashes or exits
   // early, the browser process will never detect it.  For this reason
   // we defer tearing down the GPU process until receiving the
   // GpuMsg_Initialize message from the browser.
   bool dead_on_arrival = false;
@@ skipping 212 matching lines @@
 }
 
 void CollectGraphicsInfo(content::GPUInfo* gpu_info) {
   if (!gpu_info_collector::CollectGraphicsInfo(gpu_info))
     VLOG(1) << "gpu_info_collector::CollectGraphicsInfo failed";
   content::GetContentClient()->SetGpuInfo(*gpu_info);
 }
 
 }  // namespace.