[NOT FOR COMMIT] Hacks to merge render compositor thread with UI thread

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 54800f234880975782a5eeda75aa4cc2e4663ad5..bf35baf0efb7846f14cdf5f964b236db313c917e 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -117,6 +117,11 @@
 #include "third_party/webrtc/system_wrappers/interface/event_tracer.h"
 #endif
 
+#include "content/public/browser/browser_thread.h"
+#include "chrome/browser/metrics/thread_watcher.h"
+
+
+
 using WebKit::WebDocument;
 using WebKit::WebFrame;
 using WebKit::WebNetworkStateNotifier;
@@ -604,7 +609,7 @@ void RenderThreadImpl::EnsureWebKitInitialized() {
 
   bool enable = command_line.HasSwitch(switches::kEnableThreadedCompositing);
   if (enable) {
-    compositor_thread_.reset(new CompositorThread(this));
+    compositor_thread_.reset(new CompositorThread(this, BrowserThread::UnsafeGetMessageLoopForThread(BrowserThread::UI)));
     AddFilter(compositor_thread_->GetMessageFilter());
     compositor_support->initialize(compositor_thread_->GetWebThread());
   } else {
@@ -883,7 +888,7 @@ void RenderThreadImpl::OnGpuVDAContextLoss() {
   if (!self->gpu_vda_context3d_.get())
     return;
   if (self->compositor_thread()) {
-    self->compositor_thread()->GetWebThread()->message_loop()->DeleteSoon(
+    BrowserThread::UnsafeGetMessageLoopForThread(BrowserThread::UI)->DeleteSoon(
         FROM_HERE, self->gpu_vda_context3d_.release());
   } else {
     self->gpu_vda_context3d_.reset();