Remove current implementation of frame timing events.

cc/trees/threaded_channel.h

Index: cc/trees/threaded_channel.h
diff --git a/cc/trees/threaded_channel.h b/cc/trees/threaded_channel.h
index 46b7d5f460f5147e16239129fa77c1bf2428d6f3..77a51d13a57e492f100e711bb0c051e60f2acaa9 100644
--- a/cc/trees/threaded_channel.h
+++ b/cc/trees/threaded_channel.h
@@ -126,10 +126,6 @@ class CC_EXPORT ThreadedChannel : public ChannelMain, public ChannelImpl {
       bool success,
       const RendererCapabilities& capabilities) override;
   void DidCompletePageScaleAnimation() override;
-  void PostFrameTimingEventsOnMain(
-      std::unique_ptr<FrameTimingTracker::CompositeTimingSet> composite_events,
-      std::unique_ptr<FrameTimingTracker::MainFrameTimingSet> main_frame_events)
-      override;
   void BeginMainFrame(std::unique_ptr<BeginMainFrameAndCommitState>
                           begin_main_frame_state) override;