[Extensions] Clean up the handling of ExtensionHostMsg_Request

apps/custom_launcher_page_contents.cc

 // 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.
 
 #include "apps/custom_launcher_page_contents.h"
 
 #include <string>
 
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/chrome_extension_web_contents_observer.h"
@@ skipping 12 matching lines @@
     scoped_ptr<extensions::AppDelegate> app_delegate,
     const std::string& extension_id)
     : app_delegate_(app_delegate.Pass()), extension_id_(extension_id) {
 }
 
 CustomLauncherPageContents::~CustomLauncherPageContents() {
 }
 
 void CustomLauncherPageContents::Initialize(content::BrowserContext* context,
                                             const GURL& url) {
-  extension_function_dispatcher_.reset(
-      new extensions::ExtensionFunctionDispatcher(context, this));
-
   web_contents_.reset(
       content::WebContents::Create(content::WebContents::CreateParams(
           context, content::SiteInstance::CreateForURL(context, url))));
 
-  Observe(web_contents());
   web_contents_->GetMutableRendererPrefs()
       ->browser_handles_all_top_level_requests = true;
   web_contents_->GetRenderViewHost()->SyncRendererPrefs();
 
   helper_.reset(new extensions::AppWebContentsHelper(
       context, extension_id_, web_contents_.get(), app_delegate_.get()));
   web_contents_->SetDelegate(this);
 
   extensions::SetViewType(web_contents(), extensions::VIEW_TYPE_LAUNCHER_PAGE);
 
@@ skipping 77 matching lines @@
 }
 
 bool CustomLauncherPageContents::CheckMediaAccessPermission(
     content::WebContents* web_contents,
     const GURL& security_origin,
     content::MediaStreamType type) {
   DCHECK_EQ(web_contents_.get(), web_contents);
   return helper_->CheckMediaAccessPermission(security_origin, type);
 }
 
-bool CustomLauncherPageContents::OnMessageReceived(
-    const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(CustomLauncherPageContents, message)
-  IPC_MESSAGE_HANDLER(ExtensionHostMsg_Request, OnRequest)
-  IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-extensions::WindowController*
-CustomLauncherPageContents::GetExtensionWindowController() const {
-  return NULL;
-}
-
-content::WebContents* CustomLauncherPageContents::GetAssociatedWebContents()
-    const {
-  return web_contents();
-}
-
-void CustomLauncherPageContents::OnRequest(
-    const ExtensionHostMsg_Request_Params& params) {
-  extension_function_dispatcher_->Dispatch(params,
-                                           web_contents_->GetRenderViewHost());
-}
-
 }  // namespace apps