[Extensions] Clean up the handling of ExtensionHostMsg_Request

apps/custom_launcher_page_contents.cc

Index: apps/custom_launcher_page_contents.cc
diff --git a/apps/custom_launcher_page_contents.cc b/apps/custom_launcher_page_contents.cc
index 20744b33c26ecc2d517ec080c9b4a4d8836f14e0..8888993aac5c39e380dc2df0ecc7ff1d34ae93ab 100644
--- a/apps/custom_launcher_page_contents.cc
+++ b/apps/custom_launcher_page_contents.cc
@@ -30,14 +30,10 @@ 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();
@@ -135,30 +131,4 @@ bool CustomLauncherPageContents::CheckMediaAccessPermission(
   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