Plugin Power Saver: Implement size-based heuristic for peripheral content.

content/renderer/pepper/pepper_plugin_instance_impl.h

Index: content/renderer/pepper/pepper_plugin_instance_impl.h
diff --git a/content/renderer/pepper/pepper_plugin_instance_impl.h b/content/renderer/pepper/pepper_plugin_instance_impl.h
index 36d2a268c52860f15b38db3c5b6dc29431fa8531..5389a8be4a323b4c32c8581f978d5751e6522aa6 100644
--- a/content/renderer/pepper/pepper_plugin_instance_impl.h
+++ b/content/renderer/pepper/pepper_plugin_instance_impl.h
@@ -687,10 +687,8 @@ class CONTENT_EXPORT PepperPluginInstanceImpl
                                  int pending_host_id,
                                  const ppapi::URLResponseInfoData& data);
 
-  // Peripheral content is cross-origin plugin content determined heuristically
-  // to be not the "main attraction" of the webpage.
-  bool IsPeripheralContent() const;
   void SetPluginThrottled(bool throttled);
+  void DisablePowerSaverAndUnthrottle();
 
   RenderFrameImpl* render_frame_;
   base::Closure instance_deleted_callback_;