cc: Measure compositor timing with finer granularity

components/view_manager/surfaces/surfaces_scheduler.cc

 // Copyright 2014 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 "components/view_manager/surfaces/surfaces_scheduler.h"
 
 #include "cc/surfaces/display.h"
 
 namespace surfaces {
 
-SurfacesScheduler::SurfacesScheduler() {
+SurfacesScheduler::SurfacesScheduler()
+    : rendering_stats_instrumentation_(
+          RenderingStatsInstrumentation::Create()) {
   cc::SchedulerSettings settings;
   scheduler_ = cc::Scheduler::Create(
-      this, settings, 0, base::MessageLoop::current()->task_runner(), nullptr);
+      this, settings, 0, base::MessageLoop::current()->task_runner(), nullptr,
+      rendering_stats_instrumentation_.get());
   scheduler_->SetCanStart();
   scheduler_->SetVisible(true);
   scheduler_->SetCanDraw(true);
   scheduler_->SetNeedsCommit();
 }
 
 SurfacesScheduler::~SurfacesScheduler() {
 }
 
 void SurfacesScheduler::SetNeedsDraw() {
@@ skipping 29 matching lines @@
 
 void SurfacesScheduler::DidFinishImplFrame() {
 }
 
 void SurfacesScheduler::ScheduledActionSendBeginMainFrame() {
   scheduler_->NotifyBeginMainFrameStarted();
   scheduler_->NotifyReadyToCommit();
 }
 
 cc::DrawResult SurfacesScheduler::ScheduledActionDrawAndSwapIfPossible() {
-  base::TimeTicks start = base::TimeTicks::Now();
   for (const auto& it : displays_) {
     it->DrawAndSwap();
   }
-  base::TimeDelta duration = base::TimeTicks::Now() - start;
-
-  draw_estimate_ = (duration + draw_estimate_) / 2;
   return cc::DRAW_SUCCESS;
 }
 
 cc::DrawResult SurfacesScheduler::ScheduledActionDrawAndSwapForced() {
   NOTREACHED() << "ScheduledActionDrawAndSwapIfPossible always succeeds.";
   return cc::DRAW_SUCCESS;
 }
 
 void SurfacesScheduler::ScheduledActionAnimate() {
 }
@@ skipping 10 matching lines @@
 
 void SurfacesScheduler::ScheduledActionPrepareTiles() {
 }
 
 void SurfacesScheduler::ScheduledActionInvalidateOutputSurface() {
 }
 
 void SurfacesScheduler::DidAnticipatedDrawTimeChange(base::TimeTicks time) {
 }
 
-base::TimeDelta SurfacesScheduler::DrawDurationEstimate() {
-  return draw_estimate_;
-}
-
-base::TimeDelta SurfacesScheduler::BeginMainFrameToCommitDurationEstimate() {
-  return base::TimeDelta();
-}
-
-base::TimeDelta SurfacesScheduler::CommitToActivateDurationEstimate() {
-  return base::TimeDelta();
-}
-
 void SurfacesScheduler::SendBeginFramesToChildren(
     const cc::BeginFrameArgs& args) {
 }
 
 void SurfacesScheduler::SendBeginMainFrameNotExpectedSoon() {
 }
 
 }  // namespace mojo