Add accessor for frameTimingRequests for blink unit tests.

cc/layers/layer.h

Index: cc/layers/layer.h
diff --git a/cc/layers/layer.h b/cc/layers/layer.h
index 4eb5e8173a6580bb152dec52c87a7ca359e12ab9..26880779c53bd4d992685565d8019cd131c58e2a 100644
--- a/cc/layers/layer.h
+++ b/cc/layers/layer.h
@@ -528,6 +528,11 @@ 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: