[not for review] Add Draw entries to window Performance Timeline

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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 "content/renderer/gpu/render_widget_compositor.h"
 
 #include <limits>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 777 matching lines @@
 void RenderWidgetCompositor::ApplyViewportDeltas(
     const gfx::Vector2d& scroll_delta,
     float page_scale,
     float top_controls_delta) {
   widget_->webwidget()->applyViewportDeltas(
       scroll_delta,
       page_scale,
       top_controls_delta);
 }
 
+static std::pair<int, double> TickToDouble(
+    const std::pair<int, const base::TimeTicks>& tick) {
+  return std::make_pair(tick.first,
+                        (tick.second - base::TimeTicks()).InSecondsF());
+}
+
+void RenderWidgetCompositor::RecordCommitTiming(
+    int64_t rect_id,
+    const std::pair<int, base::TimeTicks>& commit) {
+  std::vector<std::pair<int, double> > commitTiming(1);
+  commitTiming[0] = TickToDouble(commit);
+  widget_->webwidget()->recordSmoothnessTimingEvent(
+      blink::WebWidget::CommitEvent, rect_id, commitTiming);
+}
+void RenderWidgetCompositor::RecordCompositeTiming(
+    int64_t rect_id,
+    const std::vector<std::pair<int, base::TimeTicks> >& composites) {
+  std::vector<std::pair<int, double> > compositeTiming(composites.size());
+  std::transform(composites.begin(),
+                 composites.end(),
+                 compositeTiming.begin(),
+                 TickToDouble);
+  widget_->webwidget()->recordSmoothnessTimingEvent(
+      blink::WebWidget::CompositeEvent, rect_id, compositeTiming);
+}
+
 scoped_ptr<cc::OutputSurface> RenderWidgetCompositor::CreateOutputSurface(
     bool fallback) {
   return widget_->CreateOutputSurface(fallback);
 }
 
 void RenderWidgetCompositor::DidInitializeOutputSurface() {
 }
 
 void RenderWidgetCompositor::WillCommit() {
   widget_->InstrumentWillComposite();
@@ skipping 39 matching lines @@
   widget_->OnSwapBuffersAborted();
 }
 
 void RenderWidgetCompositor::RateLimitSharedMainThreadContext() {
   cc::ContextProvider* provider =
       RenderThreadImpl::current()->SharedMainThreadContextProvider().get();
   provider->ContextGL()->RateLimitOffscreenContextCHROMIUM();
 }
 
 }  // namespace content