[Extensions] Clean up the handling of ExtensionHostMsg_Request

chrome/browser/extensions/tab_helper.h

 // Copyright (c) 2012 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_BROWSER_EXTENSIONS_TAB_HELPER_H_
 #define CHROME_BROWSER_EXTENSIONS_TAB_HELPER_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 149 matching lines @@
   // Message handlers.
   void OnDidGetWebApplicationInfo(const WebApplicationInfo& info);
   void OnInlineWebstoreInstall(int install_id,
                                int return_route_id,
                                const std::string& webstore_item_id,
                                const GURL& requestor_url,
                                int listeners_mask);
   void OnGetAppInstallState(const GURL& requestor_url,
                             int return_route_id,
                             int callback_id);
-  void OnRequest(const ExtensionHostMsg_Request_Params& params);
   void OnContentScriptsExecuting(
       const ScriptExecutionObserver::ExecutingScriptsMap& extension_ids,
       const GURL& on_url);
   void OnWatchedPageChange(const std::vector<std::string>& css_selectors);
   void OnDetailedConsoleMessageAdded(const base::string16& message,
                                      const base::string16& source,
                                      const StackTrace& stack_trace,
                                      int32 severity_level);
 
   // App extensions related methods:
@@ skipping 38 matching lines @@
   base::ObserverList<ScriptExecutionObserver> script_execution_observers_;
 
   // If non-null this tab is an app tab and this is the extension the tab was
   // created for.
   const Extension* extension_app_;
 
   // Icon for extension_app_ (if non-null) or a manually-set icon for
   // non-extension apps.
   SkBitmap extension_app_icon_;
 
-  // Process any extension messages coming from the tab.
-  extensions::ExtensionFunctionDispatcher extension_function_dispatcher_;
-
   // Cached web app info data.
   WebApplicationInfo web_app_info_;
 
   // Which deferred action to perform when OnDidGetApplicationInfo is notified
   // from a WebContents.
   WebAppAction pending_web_app_action_;
 
   // Which navigation entry was active when the GetApplicationInfo request was
   // sent, for verification when the reply returns.
   int last_committed_nav_entry_unique_id_;
@@ skipping 26 matching lines @@
 
   // Generic weak ptr factory for posting callbacks.
   base::WeakPtrFactory<TabHelper> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TabHelper);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_TAB_HELPER_H_