Hook up DidReceiveInputEvent to the blink scheduler

content/renderer/scheduler/null_renderer_scheduler.cc

Index: content/renderer/scheduler/null_renderer_scheduler.cc
diff --git a/content/renderer/scheduler/null_renderer_scheduler.cc b/content/renderer/scheduler/null_renderer_scheduler.cc
index cf76da39426b47aa20f7c06b6ff2a97df450d111..54dcbe54eb0d7b48fbe195741c3ff98564be68ad 100644
--- a/content/renderer/scheduler/null_renderer_scheduler.cc
+++ b/content/renderer/scheduler/null_renderer_scheduler.cc
@@ -69,6 +69,9 @@ void NullRendererScheduler::DidCommitFrameToCompositor() {
 void NullRendererScheduler::DidReceiveInputEvent() {
 }
 
+void NullRendererScheduler::DidAnimate() {
+}
+
 bool NullRendererScheduler::ShouldYieldForHighPriorityWork() {
   return false;
 }
@@ -76,4 +79,4 @@ bool NullRendererScheduler::ShouldYieldForHighPriorityWork() {
 void NullRendererScheduler::Shutdown() {
 }
 
-}  // namespace content
+}  // namespace content