[Extensions] Clean up the handling of ExtensionHostMsg_Request

extensions/browser/app_window/app_window_contents.cc

Index: extensions/browser/app_window/app_window_contents.cc
diff --git a/extensions/browser/app_window/app_window_contents.cc b/extensions/browser/app_window/app_window_contents.cc
index 6c3909a4c39f32d694b4251a4fdbe4dfc3eaca36..396a638fad38b8283b81aadcfc56c16c4f48ccc5 100644
--- a/extensions/browser/app_window/app_window_contents.cc
+++ b/extensions/browser/app_window/app_window_contents.cc
@@ -28,9 +28,6 @@ void AppWindowContentsImpl::Initialize(content::BrowserContext* context,
                                        const GURL& url) {
   url_ = url;
 
-  extension_function_dispatcher_.reset(
-      new ExtensionFunctionDispatcher(context, this));
-
   web_contents_.reset(
       content::WebContents::Create(content::WebContents::CreateParams(
           context, content::SiteInstance::CreateForURL(context, url_))));
@@ -96,10 +93,13 @@ content::WebContents* AppWindowContentsImpl::GetWebContents() const {
   return web_contents_.get();
 }
 
+WindowController* AppWindowContentsImpl::GetWindowController() const {
+  return nullptr;
+}
+
 bool AppWindowContentsImpl::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(AppWindowContentsImpl, message)
-    IPC_MESSAGE_HANDLER(ExtensionHostMsg_Request, OnRequest)
     IPC_MESSAGE_HANDLER(ExtensionHostMsg_UpdateDraggableRegions,
                         UpdateDraggableRegions)
     IPC_MESSAGE_UNHANDLED(handled = false)
@@ -107,20 +107,6 @@ bool AppWindowContentsImpl::OnMessageReceived(const IPC::Message& message) {
   return handled;
 }
 
-WindowController* AppWindowContentsImpl::GetExtensionWindowController() const {
-  return NULL;
-}
-
-content::WebContents* AppWindowContentsImpl::GetAssociatedWebContents() const {
-  return web_contents_.get();
-}
-
-void AppWindowContentsImpl::OnRequest(
-    const ExtensionHostMsg_Request_Params& params) {
-  extension_function_dispatcher_->Dispatch(
-      params, web_contents_->GetRenderViewHost());
-}
-
 void AppWindowContentsImpl::UpdateDraggableRegions(
     const std::vector<DraggableRegion>& regions) {
   host_->UpdateDraggableRegions(regions);