Change extension unload notification to indicate updates....

chrome/browser/ui/views/extensions/extension_installed_bubble.cc

 // Copyright (c) 2010 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/views/extensions/extension_installed_bubble.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "base/i18n/rtl.h"
 #include "base/message_loop.h"
@@ skipping 250 matching lines @@
                                        const NotificationDetails& details) {
   if (type == NotificationType::EXTENSION_LOADED) {
     const Extension* extension = Details<const Extension>(details).ptr();
     if (extension == extension_) {
       animation_wait_retries_ = 0;
       // PostTask to ourself to allow all EXTENSION_LOADED Observers to run.
       MessageLoopForUI::current()->PostTask(FROM_HERE, NewRunnableMethod(this,
           &ExtensionInstalledBubble::ShowInternal));
     }
   } else if (type == NotificationType::EXTENSION_UNLOADED) {
-    const Extension* extension = Details<const Extension>(details).ptr();
+    const Extension* extension =
+        Details<UnloadedExtensionInfo>(details)->extension;
     if (extension == extension_)
       extension_ = NULL;
   } else {
     NOTREACHED() << L"Received unexpected notification";
   }
 }
 
 void ExtensionInstalledBubble::ShowInternal() {
   BrowserView* browser_view = BrowserView::GetBrowserViewForNativeWindow(
       browser_->window()->GetNativeHandle());
@@ skipping 66 matching lines @@
   if (extension_ && type_ == PAGE_ACTION) {
     BrowserView* browser_view = BrowserView::GetBrowserViewForNativeWindow(
         browser_->window()->GetNativeHandle());
     browser_view->GetLocationBarView()->SetPreviewEnabledPageAction(
         extension_->page_action(),
         false);  // preview_enabled
   }
 
   Release();  // Balanced in ctor.
 }