Pass collected frame timing events to Blink

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index db99ea7c5be1dffdad3cdbe1ffd7784d160f7264..2d787943b9833fd0e5320fb717cc60558ca7c84d 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -877,6 +877,51 @@ void RenderWidgetCompositor::ApplyViewportDeltas(
       top_controls_delta);
 }
 
+namespace {
+
+blink::WebFrameTimingEvent CompositeTimingEventToDouble(
+    const cc::FrameTimingTracker::CompositeTimingEvent& event) {
+  return blink::WebFrameTimingEvent(event.frame_id,
+      (event.timestamp - base::TimeTicks()).InSecondsF());
+}
+
+blink::WebFrameTimingEvent MainFrameTimingEventToDouble(
+    const cc::FrameTimingTracker::MainFrameTimingEvent& event) {
+  return blink::WebFrameTimingEvent(event.frame_id,
+      (event.timestamp - base::TimeTicks()).InSecondsF(),
+      (event.end_time - base::TimeTicks()).InSecondsF());
+}
+
+} // namespace
+
+void RenderWidgetCompositor::RecordCompositeTimings(
+    cc::FrameTimingTracker::CompositeTimingSet* composites) {
+  for (const auto& record : *composites ) {
+    int64_t frameId = record.first;
+    const std::vector<cc::FrameTimingTracker::CompositeTimingEvent>& events =
+        record.second;
+    std::vector<blink::WebFrameTimingEvent> webEvents(events.size());
+    std::transform(events.begin(), events.end(), webEvents.begin(),
+        CompositeTimingEventToDouble);
+    widget_->webwidget()->recordFrameTimingEvent(
+        blink::WebWidget::CompositeEvent, frameId, webEvents);
+  }
+}
+
+void RenderWidgetCompositor::RecordRenderTimings(
+    cc::FrameTimingTracker::MainFrameTimingSet* renders) {
+  for (const auto& record : *renders ) {
+    int64_t frameId = record.first;
+    const std::vector<cc::FrameTimingTracker::MainFrameTimingEvent>& events =
+        record.second;
+    std::vector<blink::WebFrameTimingEvent> webEvents(events.size());
+    std::transform(events.begin(), events.end(), webEvents.begin(),
+        MainFrameTimingEventToDouble);
+    widget_->webwidget()->recordFrameTimingEvent(
+        blink::WebWidget::RenderEvent, frameId, webEvents);
+  }
+}
+
 void RenderWidgetCompositor::RequestNewOutputSurface() {
   // If the host is closing, then no more compositing is possible.  This
   // prevents shutdown races between handling the close message and