Enables compositing support for webview.

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 574 matching lines @@
   WebKit::initialize(webkit_platform_support_.get());
   WebKit::setSharedWorkerRepository(
       webkit_platform_support_.get()->sharedWorkerRepository());
   WebKit::setIDBFactory(
       webkit_platform_support_.get()->idbFactory());
 
   WebKit::WebCompositorSupport* compositor_support =
       WebKit::Platform::current()->compositorSupport();
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 
-  // TODO(fsamuel): Guests don't currently support threaded compositing.
-  // This should go away with the new design of the browser plugin.
-  // The new design can be tracked at: http://crbug.com/134492.
-  bool is_guest = command_line.HasSwitch(switches::kGuestRenderer);
-  bool threaded = command_line.HasSwitch(switches::kEnableThreadedCompositing);
-
-  bool enable = threaded && !is_guest;
+  bool enable = command_line.HasSwitch(switches::kEnableThreadedCompositing);
   if (enable) {
     compositor_thread_.reset(new CompositorThread(this));
     AddFilter(compositor_thread_->GetMessageFilter());
     compositor_support->initialize(compositor_thread_->GetWebThread());
   } else {
     compositor_support->initialize(NULL);
   }
   compositor_initialized_ = true;
 
   MessageLoop* output_surface_loop = enable ?
@@ skipping 540 matching lines @@
 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();
 }
 
 }  // namespace content