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

components/plugins/renderer/loadable_plugin_placeholder.h

Index: components/plugins/renderer/loadable_plugin_placeholder.h
diff --git a/components/plugins/renderer/loadable_plugin_placeholder.h b/components/plugins/renderer/loadable_plugin_placeholder.h
index e67c86104537182898d1c84b85af0e75b5f07b05..8816f4b10f415069dcf7f50daf6a26c047e47371 100644
--- a/components/plugins/renderer/loadable_plugin_placeholder.h
+++ b/components/plugins/renderer/loadable_plugin_placeholder.h
@@ -26,6 +26,8 @@ class LoadablePluginPlaceholder
   }
 
 #if defined(ENABLE_PLUGINS)
+  bool power_saver_enabled() const { return power_saver_enabled_; }
+
   void set_power_saver_enabled(bool power_saver_enabled) {
     power_saver_enabled_ = power_saver_enabled;
   }
@@ -60,6 +62,7 @@ class LoadablePluginPlaceholder
   void SetPluginInfo(const content::WebPluginInfo& plugin_info);
   const content::WebPluginInfo& GetPluginInfo() const;
   void SetIdentifier(const std::string& identifier);
+  const std::string& GetIdentifier() const;
   bool LoadingAllowed() const { return allow_loading_; }
 
   // Replace this placeholder with a different plugin (which could be
@@ -100,6 +103,9 @@ class LoadablePluginPlaceholder
 
   bool LoadingBlocked() const;
 
+  // Plugin creation is embedder-specific.
+  virtual blink::WebPlugin* CreatePlugin() = 0;
+
   content::WebPluginInfo plugin_info_;
 
   base::string16 message_;