Remove current implementation of frame timing events.

cc/trees/proxy_impl.h

Index: cc/trees/proxy_impl.h
diff --git a/cc/trees/proxy_impl.h b/cc/trees/proxy_impl.h
index 181fb29392fee9b5a140549c9fa06198dc35fd80..06930a12274d8a58c4e26f1a7e8b82a9f7dd32ae 100644
--- a/cc/trees/proxy_impl.h
+++ b/cc/trees/proxy_impl.h
@@ -106,11 +106,6 @@ class CC_EXPORT ProxyImpl : public NON_EXPORTED_BASE(LayerTreeHostImplClient),
   void DidPrepareTiles() override;
   void DidCompletePageScaleAnimationOnImplThread() override;
   void OnDrawForOutputSurface(bool resourceless_software_draw) override;
-  // This should only be called by LayerTreeHostImpl::PostFrameTimingEvents.
-  void PostFrameTimingEventsOnImplThread(
-      std::unique_ptr<FrameTimingTracker::CompositeTimingSet> composite_events,
-      std::unique_ptr<FrameTimingTracker::MainFrameTimingSet> main_frame_events)
-      override;
 
   // SchedulerClient implementation
   void WillBeginImplFrame(const BeginFrameArgs& args) override;
@@ -158,10 +153,6 @@ class CC_EXPORT ProxyImpl : public NON_EXPORTED_BASE(LayerTreeHostImplClient),
 
   RenderingStatsInstrumentation* rendering_stats_instrumentation_;
 
-  // Values used to keep track of frame durations. Used only in frame timing.
-  BeginFrameArgs last_begin_main_frame_args_;
-  BeginFrameArgs last_processed_begin_main_frame_args_;
-
   std::unique_ptr<LayerTreeHostImpl> layer_tree_host_impl_;
 
   ChannelImpl* channel_impl_;