Remove notifications from the sad tab helper.

chrome/browser/ui/sad_tab_helper.cc

 // Copyright (c) 2012 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/ui/sad_tab_helper.h"
 
 #include "base/logging.h"
 #include "chrome/browser/browser_shutdown.h"
 #include "chrome/browser/ui/sad_tab.h"
-#include "content/public/browser/notification_source.h"
-#include "content/public/browser/notification_types.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_view.h"
 
 DEFINE_WEB_CONTENTS_USER_DATA_KEY(SadTabHelper);
 
 SadTabHelper::~SadTabHelper() {
 }
 
 SadTabHelper::SadTabHelper(content::WebContents* web_contents)
     : content::WebContentsObserver(web_contents) {
-  registrar_.Add(this, content::NOTIFICATION_WEB_CONTENTS_CONNECTED,
-                 content::Source<content::WebContents>(web_contents));
+}
+
+void SadTabHelper::RenderViewReady() {
+  if (sad_tab_) {
+    sad_tab_->Close();
+    sad_tab_.reset();
+  }
 }
 
 void SadTabHelper::RenderProcessGone(base::TerminationStatus status) {
   // Only show the sad tab if we're not in browser shutdown, so that WebContents
   // objects that are not in a browser (e.g., HTML dialogs) and thus are
   // visible do not flash a sad tab page.
   if (browser_shutdown::GetShutdownType() != browser_shutdown::NOT_VALID)
     return;
 
   if (sad_tab_)
     return;
 
   if (chrome::SadTab::ShouldShow(status))
     InstallSadTab(status);
 }
 
-void SadTabHelper::Observe(int type,
-                           const content::NotificationSource& source,
-                           const content::NotificationDetails& details) {
-  DCHECK_EQ(content::NOTIFICATION_WEB_CONTENTS_CONNECTED, type);
-  if (sad_tab_) {
-    sad_tab_->Close();
-    sad_tab_.reset();
-  }
-}
-
 void SadTabHelper::InstallSadTab(base::TerminationStatus status) {
   chrome::SadTabKind kind =
       (status == base::TERMINATION_STATUS_PROCESS_WAS_KILLED) ?
           chrome::SAD_TAB_KIND_KILLED : chrome::SAD_TAB_KIND_CRASHED;
   sad_tab_.reset(chrome::SadTab::Create(web_contents(), kind));
   sad_tab_->Show();
 }