Plugin Power Saver: Make PPS work well with prerendered pages.

ppapi/api/private/ppb_testing_private.idl

Index: ppapi/api/private/ppb_testing_private.idl
diff --git a/ppapi/api/private/ppb_testing_private.idl b/ppapi/api/private/ppb_testing_private.idl
index 8de73f73f34f091b2ab6fc18e4ef5cf107eb9946..863d30c91f9c600eb6de9650b7bd9fa747a1cbb3 100644
--- a/ppapi/api/private/ppb_testing_private.idl
+++ b/ppapi/api/private/ppb_testing_private.idl
@@ -77,13 +77,20 @@ interface PPB_Testing_Private {
    * otherwise.
    */
   PP_Bool IsOutOfProcess();
-  
+
   /**
-   * Returns PP_TRUE if the plugin is peripheral, PP_FALSE otherwise.
+   * Returns PP_TRUE if the plugin is peripheral, PP_FALSE otherwise. Used to
+   * test the Plugin Power Saver feature.
    */
   PP_Bool IsPeripheral([in] PP_Instance instance);
 
   /**
+   * Returns PP_TRUE if the plugin is throttled, PP_FALSE otherwise. Used to
+   * test the Plugin Power Saver feature.
+   */
+  PP_Bool IsThrottled([in] PP_Instance instance);
+
+  /**
    * Passes the input event to the browser, which sends it back to the
    * plugin. The plugin should implement PPP_InputEvent and register for
    * the input event type.