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

chrome/renderer/plugins/chrome_plugin_placeholder.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_RENDERER_PLUGINS_CHROME_PLUGIN_PLACEHOLDER_H_
 #define CHROME_RENDERER_PLUGINS_CHROME_PLUGIN_PLACEHOLDER_H_
 
 #include "components/plugins/renderer/loadable_plugin_placeholder.h"
 #include "content/public/renderer/context_menu_client.h"
 #include "content/public/renderer/render_process_observer.h"
@@ skipping 51 matching lines @@
 #endif
 
  private:
   ChromePluginPlaceholder(content::RenderFrame* render_frame,
                           blink::WebLocalFrame* frame,
                           const blink::WebPluginParams& params,
                           const std::string& html_data,
                           const base::string16& title);
   ~ChromePluginPlaceholder() override;
 
+  // content::LoadablePluginPlaceholder method
+  blink::WebPlugin* CreatePlugin() override;
+
   // gin::Wrappable (via PluginPlaceholder) method
   gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
       v8::Isolate* isolate) override;
 
   // content::RenderViewObserver (via PluginPlaceholder) override:
   bool OnMessageReceived(const IPC::Message& message) override;
 
   // WebViewPlugin::Delegate (via PluginPlaceholder) methods:
   void ShowContextMenu(const blink::WebMouseEvent&) override;
 
@@ skipping 29 matching lines @@
 #endif
 
   bool has_host_;
   int context_menu_request_id_;  // Nonzero when request pending.
   base::string16 plugin_name_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromePluginPlaceholder);
 };
 
 #endif  // CHROME_RENDERER_PLUGINS_CHROME_PLUGIN_PLACEHOLDER_H_