added gpu_benchmarking_extension boilerplate and hooked it up to a new switch.

content/renderer/render_thread_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/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 35 matching lines @@
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/public/renderer/render_process_observer.h"
 #include "content/public/renderer/render_view_visitor.h"
 #include "content/renderer/browser_plugin/browser_plugin_channel_manager.h"
 #include "content/renderer/browser_plugin/browser_plugin_registry.h"
 #include "content/renderer/devtools_agent_filter.h"
 #include "content/renderer/dom_storage/dom_storage_dispatcher.h"
 #include "content/renderer/dom_storage/webstoragearea_impl.h"
 #include "content/renderer/dom_storage/webstoragenamespace_impl.h"
 #include "content/renderer/gpu/compositor_thread.h"
+#include "content/renderer/gpu_benchmarking_extension.h"

[jam, 2012/06/08 00:52:04]

should this code be under content/renderer/gpu/?

[dmurph, 2012/06/08 18:36:22]

following the alphabetical order of 'renderer' (which is the only order that
makes sense here), 'gpu' comes before 'gpu_'.  

[jam, 2012/06/08 18:39:13]

I meant should the file itself be located in content/renderer/gpu/

[dmurph, 2012/06/08 19:30:13]

Ah.  Yes, it should.  Moved.

 #include "content/renderer/media/audio_input_message_filter.h"
 #include "content/renderer/media/audio_message_filter.h"
 #include "content/renderer/media/media_stream_center.h"
 #include "content/renderer/media/video_capture_impl_manager.h"
 #include "content/renderer/media/video_capture_message_filter.h"
 #include "content/renderer/plugin_channel_host.h"
 #include "content/renderer/render_process_impl.h"
 #include "content/renderer/render_view_impl.h"
 #include "content/renderer/renderer_webkitplatformsupport_impl.h"
 #include "grit/content_resources.h"
@@ skipping 168 matching lines @@
   audio_message_filter_ = new AudioMessageFilter();
   AddFilter(audio_message_filter_.get());
 
   devtools_agent_message_filter_ = new DevToolsAgentFilter();
   AddFilter(devtools_agent_message_filter_.get());
 
   AddFilter(new IndexedDBMessageFilter);
 
   content::GetContentClient()->renderer()->RenderThreadStarted();
 
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kEnableGpuBenchmarking))
+      RegisterExtension(content::GpuBenchmarkingExtension::Get());

[jam, 2012/06/08 00:52:04]

nit: 2 spaces

[dmurph, 2012/06/08 18:36:22]

Done.

+
   // Note that under Linux, the media library will normally already have
   // been initialized by the Zygote before this instance became a Renderer.
   FilePath media_path;
   PathService::Get(content::DIR_MEDIA_LIBS, &media_path);
   if (!media_path.empty())
     media::InitializeMediaLibrary(media_path);
 
   TRACE_EVENT_END_ETW("RenderThreadImpl::Init", 0, "");
 }
 
@@ skipping 732 matching lines @@
 
 scoped_refptr<base::MessageLoopProxy>
 RenderThreadImpl::GetFileThreadMessageLoopProxy() {
   DCHECK(message_loop() == MessageLoop::current());
   if (!file_thread_.get()) {
     file_thread_.reset(new base::Thread("Renderer::FILE"));
     file_thread_->Start();
   }
   return file_thread_->message_loop_proxy();
 }