Pass collected frame timing events to Blink

cc/trees/thread_proxy.cc

Index: cc/trees/thread_proxy.cc
diff --git a/cc/trees/thread_proxy.cc b/cc/trees/thread_proxy.cc
index 3010fba95c32165329df0ad5ea7a3d56d8c2a879..4b3cab2df074e175ffcf97987e9472aecb5af068 100644
--- a/cc/trees/thread_proxy.cc
+++ b/cc/trees/thread_proxy.cc
@@ -710,6 +710,14 @@ void ThreadProxy::ScheduledActionSendBeginMainFrame() {
       impl().layer_tree_host_impl->memory_allocation_priority_cutoff();
   begin_main_frame_state->evicted_ui_resources =
       impl().layer_tree_host_impl->EvictedUIResourcesExist();
+  begin_main_frame_state->frame_composite_counts =
+      impl()
+          .layer_tree_host_impl->frame_timing_tracker()
+          ->GroupCompositeCountsByRectId();
+  begin_main_frame_state->frame_render_counts =
+      impl()
+          .layer_tree_host_impl->frame_timing_tracker()
+          ->GroupMainFrameCountsByRectId();
   // TODO(vmpstr): This needs to be fixed if
   // main_frame_before_activation_enabled is set, since we might run this code
   // twice before recording a duration. crbug.com/469824
@@ -791,6 +799,12 @@ void ThreadProxy::BeginMainFrame(
   layer_tree_host()->ApplyScrollAndScale(
       begin_main_frame_state->scroll_info.get());
 
+  layer_tree_host()->RecordCompositeTimings(
+      begin_main_frame_state->frame_composite_counts.get());

[vmpstr, 2015/05/12 23:48:25]

Should we be passing ownership here instead? It's a bit weird to just give a raw
pointer, since we don't know from where what LTH plans to do with it, and as far
as i can tell we don't really want to own the data anymore.

[MikeB, 2015/05/21 21:53:08]

That's how ApplyScrollAndScale does it, and that's what I was basing my change
on. Is your suggestion to just have LTH take a scoped_ptr and thread_proxy calls
.pass?

+
+  layer_tree_host()->RecordRenderTimings(
+      begin_main_frame_state->frame_render_counts.get());
+
   layer_tree_host()->WillBeginMainFrame();
 
   layer_tree_host()->BeginMainFrame(begin_main_frame_state->begin_frame_args);