Cleanup/ Remove deprecated extension notification from ExtensionHost

chrome/browser/extensions/extension_view_host.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/extensions/extension_view_host.h"
 
 #include "base/strings/string_piece.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_view.h"
 #include "chrome/browser/extensions/window_controller.h"
@@ skipping 89 matching lines @@
 
 void ExtensionViewHost::OnDidStopLoading() {
   DCHECK(did_stop_loading());
   view_->DidStopLoading();
 }
 
 void ExtensionViewHost::LoadInitialURL() {
   if (!ExtensionSystem::Get(browser_context())->
           runtime_data()->IsBackgroundPageReady(extension())) {
     // Make sure the background page loads before any others.
-    registrar()->Add(this,
-                     extensions::NOTIFICATION_EXTENSION_BACKGROUND_PAGE_READY,
-                     content::Source<Extension>(extension()));
+    registrar_.Add(this,
+                   extensions::NOTIFICATION_EXTENSION_BACKGROUND_PAGE_READY,
+                   content::Source<Extension>(extension()));
     return;
   }
 
   // Popups may spawn modal dialogs, which need positioning information.
   if (extension_host_type() == VIEW_TYPE_EXTENSION_POPUP) {
     WebContentsModalDialogManager::CreateForWebContents(host_contents());
     WebContentsModalDialogManager::FromWebContents(
         host_contents())->SetDelegate(this);
     if (!popup_manager_.get())
       popup_manager_.reset(new web_modal::PopupManager(this));
@@ skipping 166 matching lines @@
   if (associated_web_contents_)
     return associated_web_contents_;
   if (extension_host_type() == VIEW_TYPE_EXTENSION_POPUP)
     return host_contents();
   return NULL;
 }
 
 void ExtensionViewHost::Observe(int type,
                                 const content::NotificationSource& source,
                                 const content::NotificationDetails& details) {
-  if (type == extensions::NOTIFICATION_EXTENSION_BACKGROUND_PAGE_READY) {
-    DCHECK(ExtensionSystem::Get(browser_context())->
-               runtime_data()->IsBackgroundPageReady(extension()));
-    LoadInitialURL();
-    return;
-  }
-  ExtensionHost::Observe(type, source, details);
+  DCHECK_EQ(type, extensions::NOTIFICATION_EXTENSION_BACKGROUND_PAGE_READY);
+  DCHECK(ExtensionSystem::Get(browser_context())
+             ->runtime_data()
+             ->IsBackgroundPageReady(extension()));
+  LoadInitialURL();
 }
 
 }  // namespace extensions