cc: Add MainAndImplFrameTimeDelta UMA.

cc/trees/proxy_impl.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/proxy_impl.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 56 matching lines @@
   TRACE_EVENT0("cc", "ProxyImpl::ProxyImpl");
   DCHECK(IsImplThread());
   DCHECK(IsMainThreadBlocked());
 
   layer_tree_host_impl_ = layer_tree_host->CreateLayerTreeHostImpl(this);
 
   SchedulerSettings scheduler_settings(
       layer_tree_host->settings().ToSchedulerSettings());
 
   scoped_ptr<CompositorTimingHistory> compositor_timing_history(
-      new CompositorTimingHistory(CompositorTimingHistory::RENDERER_UMA,
-                                  rendering_stats_instrumentation_));
+      new CompositorTimingHistory(
+          scheduler_settings.using_synchronous_renderer_compositor,
+          CompositorTimingHistory::RENDERER_UMA,
+          rendering_stats_instrumentation_));
 
   scheduler_ = Scheduler::Create(this, scheduler_settings, layer_tree_host_id_,
                                  task_runner_provider_->ImplThreadTaskRunner(),
                                  external_begin_frame_source_.get(),
                                  std::move(compositor_timing_history));
 
   DCHECK_EQ(scheduler_->visible(), layer_tree_host_impl_->visible());
 }
 
 ProxyImpl::BlockedMainCommitOnly::BlockedMainCommitOnly()
@@ skipping 582 matching lines @@
 bool ProxyImpl::IsMainThreadBlocked() const {
   return task_runner_provider_->IsMainThreadBlocked();
 }
 
 ProxyImpl::BlockedMainCommitOnly& ProxyImpl::blocked_main_commit() {
   DCHECK(IsMainThreadBlocked() && commit_completion_event_);
   return main_thread_blocked_commit_vars_unsafe_;
 }
 
 }  // namespace cc