Pass collected frame timing events to Blink

cc/debug/frame_timing_tracker.h

Index: cc/debug/frame_timing_tracker.h
diff --git a/cc/debug/frame_timing_tracker.h b/cc/debug/frame_timing_tracker.h
index 3364993197395c32be17c57e32e28445c2136565..7b638d7f8accc1c8886f24112151869361b493ab 100644
--- a/cc/debug/frame_timing_tracker.h
+++ b/cc/debug/frame_timing_tracker.h
@@ -13,9 +13,12 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "cc/base/cc_export.h"
+#include "cc/base/delayed_unique_notifier.h"
 
 namespace cc {
 
+class LayerTreeHostImpl;
+
 // This class maintains a history of timestamps and rect IDs to communicate
 // frame events back to Blink
 // TODO(mpb): Start using this. crbug.com/442554
@@ -30,7 +33,7 @@ class CC_EXPORT FrameTimingTracker {
   };
 
   using CompositeTimingSet =
-      base::hash_map<int, std::vector<CompositeTimingEvent>>;
+      base::hash_map<int64_t, std::vector<CompositeTimingEvent>>;
 
   struct CC_EXPORT MainFrameTimingEvent {
     MainFrameTimingEvent(int frame_id,
@@ -44,9 +47,10 @@ class CC_EXPORT FrameTimingTracker {
   };
 
   using MainFrameTimingSet =
-      base::hash_map<int, std::vector<MainFrameTimingEvent>>;
+      base::hash_map<int64_t, std::vector<MainFrameTimingEvent>>;
 
-  static scoped_ptr<FrameTimingTracker> Create();
+  static scoped_ptr<FrameTimingTracker> Create(
+      LayerTreeHostImpl* layer_tree_host_impl);
 
   ~FrameTimingTracker();
 
@@ -74,11 +78,16 @@ class CC_EXPORT FrameTimingTracker {
                                int source_frame_number);
 
  private:
-  FrameTimingTracker();
+  explicit FrameTimingTracker(LayerTreeHostImpl* layer_tree_host_impl);
+
+  void PostEvents();
 
   scoped_ptr<CompositeTimingSet> composite_events_;
   scoped_ptr<MainFrameTimingSet> main_frame_events_;
 
+  LayerTreeHostImpl* layer_tree_host_impl_;
+  DelayedUniqueNotifier post_events_notifier_;
+
   DISALLOW_COPY_AND_ASSIGN(FrameTimingTracker);
 };