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..edeea21a5c040ffc87b1afd07ad48fedab37a7bb 100644
--- a/ppapi/api/private/ppb_testing_private.idl
+++ b/ppapi/api/private/ppb_testing_private.idl
@@ -77,11 +77,18 @@ interface PPB_Testing_Private {
    * otherwise.
    */
   PP_Bool IsOutOfProcess();
-  
+
+  /**
+   * Returns a dictionary describing the Power Saver state of the plugin.
+   */
+  PP_Var GetPowerSaverStatus([in] PP_Instance instance);
+
   /**
-   * Returns PP_TRUE if the plugin is peripheral, PP_FALSE otherwise.
+   * Subscribes the plugin to receieve message notifications when the browser
+   * changes the plugin's Power Saver state. Implement the HandleMessage()
+   * interface in PPP_MessageHandler to recieve these messages.
    */
-  PP_Bool IsPeripheral([in] PP_Instance instance);
+  void SubscribeToPowerSaverNotifications([in] PP_Instance instance);
 
   /**
    * Passes the input event to the browser, which sends it back to the