Hook up DidReceiveInputEvent to the blink scheduler

content/renderer/scheduler/null_renderer_scheduler.h

Index: content/renderer/scheduler/null_renderer_scheduler.h
diff --git a/content/renderer/scheduler/null_renderer_scheduler.h b/content/renderer/scheduler/null_renderer_scheduler.h
index 2c893dc48540a250ebd426585d0d3e6f9f3647fd..af1d9f337262d92d69632553756a1b0fccf2d6a5 100644
--- a/content/renderer/scheduler/null_renderer_scheduler.h
+++ b/content/renderer/scheduler/null_renderer_scheduler.h
@@ -21,6 +21,7 @@ class NullRendererScheduler : public RendererScheduler {
   void WillBeginFrame(const cc::BeginFrameArgs& args) override;
   void DidCommitFrameToCompositor() override;
   void DidReceiveInputEvent() override;
+  void DidAnimate() override;
   bool ShouldYieldForHighPriorityWork() override;
   void Shutdown() override;
 
@@ -33,4 +34,4 @@ class NullRendererScheduler : public RendererScheduler {
 
 }  // namespace content
 
-#endif  // CONTENT_RENDERER_SCHEDULER_NULL_RENDERER_SCHEDULER_H_
+#endif  // CONTENT_RENDERER_SCHEDULER_NULL_RENDERER_SCHEDULER_H_