Reland "Throttle resource message requests during user interaction"

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 2c35bd3dbb0c1cf5cf3af81ef6f5b5e6c8df93f7..7df3ff723109fba415468b065ec9165ac5b8a0df 100644
--- a/content/renderer/scheduler/null_renderer_scheduler.cc
+++ b/content/renderer/scheduler/null_renderer_scheduler.cc
@@ -78,6 +78,10 @@ void NullRendererScheduler::DidReceiveInputEventOnCompositorThread(
 void NullRendererScheduler::DidAnimateForInputOnCompositorThread() {
 }
 
+bool NullRendererScheduler::IsHighPriorityWorkAnticipated() {
+  return false;
+}
+
 bool NullRendererScheduler::ShouldYieldForHighPriorityWork() {
   return false;
 }