Remove current implementation of frame timing events.

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 03004e1e01ce05195352a7d79bc7d883a3f797b7..696f96cd63187c335b19d06b760494f3faa7958e 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -240,7 +240,6 @@ LayerTreeHostImpl::LayerTreeHostImpl(
       id_(id),
       requires_high_res_to_draw_(false),
       is_likely_to_require_a_draw_(false),
-      frame_timing_tracker_(FrameTimingTracker::Create(this)),
       mutator_(nullptr) {
   animation_host_ = AnimationHost::Create(ThreadInstance::IMPL);
   animation_host_->SetMutatorHostClient(this);
@@ -900,16 +899,6 @@ DrawResult LayerTreeHostImpl::CalculateRenderPasses(
         frame->will_draw_layers.push_back(*it);
 
         it->AppendQuads(target_render_pass, &append_quads_data);
-
-        // For layers that represent themselves, add composite frame timing
-        // requests if the visible rect intersects the requested rect.
-        for (const auto& request : it->frame_timing_requests()) {
-          if (request.rect().Intersects(it->visible_layer_rect())) {
-            frame->composite_events.push_back(
-                FrameTimingTracker::FrameAndRectIds(
-                    active_tree_->source_frame_number(), request.id()));
-          }
-        }
       }
 
       ++layers_drawn;
@@ -1611,11 +1600,6 @@ void LayerTreeHostImpl::DrawLayers(FrameData* frame) {
   base::TimeTicks frame_begin_time = CurrentBeginFrameArgs().frame_time;
   DCHECK(CanDraw());
 
-  if (!frame->composite_events.empty()) {
-    frame_timing_tracker_->SaveTimeStamps(frame_begin_time,
-                                          frame->composite_events);
-  }
-
   if (frame->has_no_damage) {
     TRACE_EVENT_INSTANT0("cc", "EarlyOut_NoDamage", TRACE_EVENT_SCOPE_THREAD);
     DCHECK(!resourceless_software_draw_);
@@ -2250,27 +2234,6 @@ void LayerTreeHostImpl::CreateResourceAndTileTaskWorkerPool(
       settings_.renderer_settings.preferred_tile_format);
 }
 
-void LayerTreeHostImpl::RecordMainFrameTiming(
-    const BeginFrameArgs& start_of_main_frame_args,
-    const BeginFrameArgs& expected_next_main_frame_args) {
-  std::vector<int64_t> request_ids;
-  active_tree_->GatherFrameTimingRequestIds(&request_ids);
-  if (request_ids.empty())
-    return;
-
-  base::TimeTicks start_time = start_of_main_frame_args.frame_time;
-  base::TimeTicks end_time = expected_next_main_frame_args.frame_time;
-  frame_timing_tracker_->SaveMainFrameTimeStamps(
-      request_ids, start_time, end_time, active_tree_->source_frame_number());
-}
-
-void LayerTreeHostImpl::PostFrameTimingEvents(
-    std::unique_ptr<FrameTimingTracker::CompositeTimingSet> composite_events,
-    std::unique_ptr<FrameTimingTracker::MainFrameTimingSet> main_frame_events) {
-  client_->PostFrameTimingEventsOnImplThread(std::move(composite_events),
-                                             std::move(main_frame_events));
-}
-
 void LayerTreeHostImpl::SetLayerTreeMutator(LayerTreeMutator* mutator) {
   TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("compositor-worker"),
                "LayerTreeHostImpl::SetLayerTreeMutator");