Refactor GuestView.

chrome/browser/guestview/adview/adview_guest.cc

 // Copyright 2013 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 "chrome/browser/guestview/adview/adview_guest.h"
 
 #include "base/strings/string_util.h"
 #include "chrome/browser/guestview/adview/adview_constants.h"
 #include "chrome/browser/guestview/guestview_constants.h"
 #include "content/public/browser/web_contents.h"
 #include "net/base/net_errors.h"
 
 using content::WebContents;
 
 AdViewGuest::AdViewGuest(WebContents* guest_web_contents,
                          const std::string& extension_id)
     : GuestView(guest_web_contents, extension_id),
       WebContentsObserver(guest_web_contents) {
 }
 
 // static
 AdViewGuest* AdViewGuest::From(int embedder_process_id,
                                int guest_instance_id) {
   GuestView* guest = GuestView::From(embedder_process_id, guest_instance_id);
   if (!guest)
     return NULL;
-  return guest->AsAdView();
+  return guest->As<AdViewGuest>();
 }
 
-GuestView::Type AdViewGuest::GetViewType() const {
-  return GuestView::ADVIEW;
-}
+// static
+GuestView::Type AdViewGuest::Type() { return GuestView::ADVIEW; }
 
-WebViewGuest* AdViewGuest::AsWebView() {
-  return NULL;
-}
-
-AdViewGuest* AdViewGuest::AsAdView() {
-  return this;
-}
+GuestView::Type AdViewGuest::GetViewType() const { return Type(); }
 
 AdViewGuest::~AdViewGuest() {
 }
 
 void AdViewGuest::DidCommitProvisionalLoadForFrame(
     int64 frame_id,
     const base::string16& frame_unique_name,
     bool is_main_frame,
     const GURL& url,
     content::PageTransition transition_type,
@@ skipping 15 matching lines @@
   // Translate the |error_code| into an error string.
   std::string error_type;
   base::RemoveChars(net::ErrorToString(error_code), "net::", &error_type);
 
   scoped_ptr<base::DictionaryValue> args(new base::DictionaryValue());
   args->SetBoolean(guestview::kIsTopLevel, is_main_frame);
   args->SetString(guestview::kUrl, validated_url.spec());
   args->SetString(guestview::kReason, error_type);
   DispatchEvent(new GuestView::Event(adview::kEventLoadAbort, args.Pass()));
 }