Implement WebKitPlatformSupport::canAccelerate2dCanvas

content/renderer/renderer_webkitplatformsupport_impl.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 "content/renderer/renderer_webkitplatformsupport_impl.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/platform_file.h"
 #include "base/shared_memory.h"
 #include "base/utf_string_conversions.h"
 #include "content/common/database_util.h"
 #include "content/common/fileapi/webblobregistry_impl.h"
 #include "content/common/fileapi/webfilesystem_impl.h"
 #include "content/common/file_utilities_messages.h"
 #include "content/common/indexed_db/proxy_webidbfactory_impl.h"
 #include "content/common/mime_registry_messages.h"
 #include "content/common/npobject_util.h"
 #include "content/common/view_messages.h"
 #include "content/common/webmessageportchannel_impl.h"
 #include "content/public/common/content_switches.h"
+#include "content/public/common/gpu_info.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/renderer/gamepad_shared_memory_reader.h"
 #include "content/renderer/media/audio_device.h"
 #include "content/renderer/media/audio_hardware.h"
 #include "content/renderer/media/renderer_webaudiodevice_impl.h"
 #include "content/renderer/render_thread_impl.h"
 #include "content/renderer/render_view_impl.h"
 #include "content/renderer/renderer_clipboard_client.h"
 #include "content/renderer/renderer_webstoragenamespace_impl.h"
 #include "content/renderer/websharedworkerrepository_impl.h"
@@ skipping 619 matching lines @@
 RendererWebKitPlatformSupportImpl::createPeerConnectionHandler(
     WebKit::WebPeerConnectionHandlerClient* client) {
   WebFrame* web_frame = WebFrame::frameForCurrentContext();
   if (!web_frame)
     return NULL;
   RenderViewImpl* render_view = RenderViewImpl::FromWebView(web_frame->view());
   if (!render_view)
     return NULL;
   return render_view->CreatePeerConnectionHandler(client);
 }
+
+bool RendererWebKitPlatformSupportImpl::canAccelerate2dCanvas() {
+  RenderThreadImpl* thread = RenderThreadImpl::current();
+  GpuChannelHost* host = thread->EstablishGpuChannelSync(
+      content::CAUSE_FOR_GPU_LAUNCH_CANVAS_2D);
+  if (!host)
+    return false;
+
+  const content::GPUInfo& gpu_info = host->gpu_info();
+  if (gpu_info.can_lose_context || gpu_info.software_rendering)
+    return false;
+
+  return true;
+}