Schedule idle handler based on CPU usage.

content/public/renderer/render_thread.h

Index: content/public/renderer/render_thread.h
diff --git a/content/public/renderer/render_thread.h b/content/public/renderer/render_thread.h
index 2140e70eab82063c732d36c4bb3a08d4e55b834f..0644578d5c84469586633dcf70adbc34cc9dd34d 100644
--- a/content/public/renderer/render_thread.h
+++ b/content/public/renderer/render_thread.h
@@ -85,16 +85,7 @@ class CONTENT_EXPORT RenderThread : public IPC::Message::Sender {
   virtual bool IsRegisteredExtension(
       const std::string& v8_extension_name) const = 0;
 
-  // Schedule a call to IdleHandler with the given initial delay.
-  virtual void ScheduleIdleHandler(int64 initial_delay_ms) = 0;
-
-  // A task we invoke periodically to assist with idle cleanup.
-  virtual void IdleHandler() = 0;
-
-  // Get/Set the delay for how often the idle handler is called.
-  virtual int64 GetIdleNotificationDelayInMs() const = 0;
-  virtual void SetIdleNotificationDelayInMs(
-      int64 idle_notification_delay_in_ms) = 0;
+  virtual void ResetIdleTimer() = 0;
 
 #if defined(OS_WIN)
   // Request that the given font be loaded by the browser so it's cached by the