Add accessor for frameTimingRequests for blink unit tests.

Related blink change: https://codereview.chromium.org/908453003/

BUG=441552

Review URL: https://codereview.chromium.org/1095483004

Cr-Commit-Position: refs/heads/master@{#326403}

cc/blink/web_layer_impl.cc

@@ -365,12 +365,27 @@ void WebLayerImpl::setFrameTimingRequests(
     const WebVector<std::pair<int64_t, WebRect>>& requests) {
   std::vector<cc::FrameTimingRequest> frame_timing_requests(requests.size());
   for (size_t i = 0; i < requests.size(); ++i) {
-    frame_timing_requests.push_back(cc::FrameTimingRequest(
-        requests[i].first, gfx::Rect(requests[i].second)));
+    frame_timing_requests[i] = cc::FrameTimingRequest(
+        requests[i].first, gfx::Rect(requests[i].second));
   }
   layer_->SetFrameTimingRequests(frame_timing_requests);
 }
 
+WebVector<std::pair<int64_t, WebRect>> WebLayerImpl::frameTimingRequests()
+    const {
+  const std::vector<cc::FrameTimingRequest>& frame_timing_requests =
+      layer_->FrameTimingRequests();
+
+  size_t num_requests = frame_timing_requests.size();
+
+  WebVector<std::pair<int64_t, WebRect>> result(num_requests);
+  for (size_t i = 0; i < num_requests; ++i) {
+    result[i] = std::make_pair(frame_timing_requests[i].id(),
+                               frame_timing_requests[i].rect());
+  }
+  return result;
+}
+
 void WebLayerImpl::setTouchEventHandlerRegion(const WebVector<WebRect>& rects) {
   cc::Region region;
   for (size_t i = 0; i < rects.size(); ++i)

cc/blink/web_layer_impl.h

@@ -128,6 +128,8 @@ class WebLayerImpl : public blink::WebLayer, public cc::LayerClient {
   virtual blink::WebScrollBlocksOn scrollBlocksOn() const;
   virtual void setFrameTimingRequests(
       const blink::WebVector<std::pair<int64_t, blink::WebRect>>& requests);
+  virtual blink::WebVector<std::pair<int64_t, blink::WebRect>>
+  frameTimingRequests() const;
   virtual void setIsContainerForFixedPositionLayers(bool is_container);
   virtual bool isContainerForFixedPositionLayers() const;
   virtual void setPositionConstraint(

cc/layers/layer.h

@@ -546,6 +546,11 @@ class CC_EXPORT Layer : public base::RefCounted<Layer>,
   // Sets new frame timing requests for this layer.
   void SetFrameTimingRequests(const std::vector<FrameTimingRequest>& requests);
 
+  // Accessor for unit tests
+  const std::vector<FrameTimingRequest>& FrameTimingRequests() const {
+    return frame_timing_requests_;
+  }
+
   void DidBeginTracing();
 
  protected: