[wip] hack to use synthetic bfs for browser compositor

content/browser/renderer_host/compositor_impl_android.cc

Index: content/browser/renderer_host/compositor_impl_android.cc
diff --git a/content/browser/renderer_host/compositor_impl_android.cc b/content/browser/renderer_host/compositor_impl_android.cc
index ebd54ca69802127c53b0794b8cac909e0a06f70a..e8c2b90dee0da228333db56c4d6f1b626578aab3 100644
--- a/content/browser/renderer_host/compositor_impl_android.cc
+++ b/content/browser/renderer_host/compositor_impl_android.cc
@@ -515,6 +515,7 @@ void CompositorImpl::SetNeedsComposite() {
 }
 
 void CompositorImpl::UpdateLayerTreeHost() {
+  TRACE_EVENT0("cc", "CompositorImpl::UpdateLayerTreeHost");
   client_->UpdateLayerTreeHost();
   if (needs_animate_) {
     needs_animate_ = false;
@@ -710,6 +711,7 @@ void CompositorImpl::DidLoseCompositorFrameSink() {
 }
 
 void CompositorImpl::DidCommit() {
+  TRACE_EVENT0("cc", "CompositorImpl::DidCommit");
   root_window_->OnCompositingDidCommit();
 }