Make <webview> use out-of-process iframe architecture.

extensions/renderer/dispatcher.h

 // Copyright 2014 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 EXTENSIONS_RENDERER_DISPATCHER_H_
 #define EXTENSIONS_RENDERER_DISPATCHER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 167 matching lines @@
   void OnUpdateTabSpecificPermissions(const GURL& visible_url,
                                       const std::string& extension_id,
                                       const URLPatternSet& new_hosts,
                                       bool update_origin_whitelist,
                                       int tab_id);
   void OnClearTabSpecificPermissions(
       const std::vector<std::string>& extension_ids,
       bool update_origin_whitelist,
       int tab_id);
   void OnUsingWebRequestAPI(bool webrequest_used);
+  void OnGuestReady(const IPC::Message& message);
 
   // UserScriptSetManager::Observer implementation.
   void OnUserScriptsUpdated(const std::set<HostID>& changed_hosts,
                             const std::vector<UserScript*>& scripts) override;
 
   void UpdateActiveExtensions();
 
   // Sets up the host permissions for |extension|.
   void InitOriginPermissions(const Extension* extension);
 
@@ skipping 107 matching lines @@
 
   // Status of webrequest usage.
   bool webrequest_used_;
 
   DISALLOW_COPY_AND_ASSIGN(Dispatcher);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_DISPATCHER_H_