[Extensions] Clean up the handling of ExtensionHostMsg_Request

chrome/browser/extensions/tab_helper.h

Index: chrome/browser/extensions/tab_helper.h
diff --git a/chrome/browser/extensions/tab_helper.h b/chrome/browser/extensions/tab_helper.h
index 575b0c7aa6ebd82f7919dadae6bc41ed72d47f20..b3088cb46e6217b13a8f42889c4e422066ce26a2 100644
--- a/chrome/browser/extensions/tab_helper.h
+++ b/chrome/browser/extensions/tab_helper.h
@@ -169,7 +169,6 @@ class TabHelper : public content::WebContentsObserver,
   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);
@@ -227,9 +226,6 @@ class TabHelper : public content::WebContentsObserver,
   // 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_;