Plugin Power Saver: Restrict Power Saver to cross-origin.

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 4b1493147a0deedf8f559539adf0d32718892c24..36d2a268c52860f15b38db3c5b6dc29431fa8531 100644
--- a/content/renderer/pepper/pepper_plugin_instance_impl.h
+++ b/content/renderer/pepper/pepper_plugin_instance_impl.h
@@ -687,6 +687,9 @@ 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);
 
   RenderFrameImpl* render_frame_;