Schedule idle handler based on CPU usage.

content/test/mock_render_thread.cc

Index: content/test/mock_render_thread.cc
diff --git a/content/test/mock_render_thread.cc b/content/test/mock_render_thread.cc
index eca409e1e333fb699a7567b90bed5ab8a3a53f8d..6d5037c2bf14efa96cf594ca6ba09d1e1c8cd977 100644
--- a/content/test/mock_render_thread.cc
+++ b/content/test/mock_render_thread.cc
@@ -127,18 +127,7 @@ bool MockRenderThread::IsRegisteredExtension(
   return false;
 }
 
-void MockRenderThread::ScheduleIdleHandler(int64 initial_delay_ms) {
-}
-
-void MockRenderThread::IdleHandler() {
-}
-
-int64 MockRenderThread::GetIdleNotificationDelayInMs() const {
-  return 0;
-}
-
-void MockRenderThread::SetIdleNotificationDelayInMs(
-    int64 idle_notification_delay_in_ms) {
+void MockRenderThread::ResetIdleTimer() {
 }
 
 #if defined(OS_WIN)