Support dynamic switching between integrated and discrete GPUs on Mac OS X.

content/renderer/pepper_platform_context_3d_impl.cc

 // 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.
 
 #include "content/renderer/pepper_platform_context_3d_impl.h"
 
 #include "base/bind.h"
 #include "content/renderer/render_thread_impl.h"
 #include "content/renderer/gpu/renderer_gl_context.h"
 #include "content/renderer/gpu/gpu_channel_host.h"
 #include "content/renderer/gpu/command_buffer_proxy.h"
 #include "googleurl/src/gurl.h"
 #include "gpu/command_buffer/client/gles2_cmd_helper.h"
 #include "gpu/command_buffer/client/gles2_implementation.h"
+#include "ui/gfx/gl/gpu_preference.h"
 
 #ifdef ENABLE_GPU
 
 PlatformContext3DImpl::PlatformContext3DImpl(RendererGLContext* parent_context)
       : parent_context_(parent_context->AsWeakPtr()),
         parent_texture_id_(0),
         command_buffer_(NULL),
         weak_ptr_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
 }
 
@@ skipping 67 matching lines @@
     attribs.push_back(RendererGLContext::NONE);
   }
 
   CommandBufferProxy* parent_command_buffer =
       parent_context_->GetCommandBufferProxy();
   command_buffer_ = channel_->CreateOffscreenCommandBuffer(
       surface_size,
       NULL,
       "*",
       attribs,
-      GURL::EmptyGURL());
+      GURL::EmptyGURL(),
+      gfx::PreferDiscreteGpu);
   if (!command_buffer_)
     return false;
 
   if (!command_buffer_->SetParent(parent_command_buffer, parent_texture_id_))
     return false;
 
   command_buffer_->SetChannelErrorCallback(
       base::Bind(&PlatformContext3DImpl::OnContextLost,
                  weak_ptr_factory_.GetWeakPtr()));
 
@@ skipping 23 matching lines @@
 }
 
 void PlatformContext3DImpl::OnContextLost() {
   DCHECK(command_buffer_);
 
   if (!context_lost_callback_.is_null())
     context_lost_callback_.Run();
 }
 
 #endif  // ENABLE_GPU