Settings Overides -- warn user when extensions override their NTP.

chrome/browser/ui/views/settings_api_bubble_helper_views.cc

 // Copyright (c) 2014 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/views/settings_api_bubble_helper_views.h"
 
+#include "chrome/browser/extensions/ntp_controlled_bubble_controller.h"
 #include "chrome/browser/extensions/settings_api_bubble_controller.h"
 #include "chrome/browser/extensions/settings_api_helpers.h"
 #include "chrome/browser/ui/browser_finder.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/views/extensions/extension_message_bubble_view.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "chrome/browser/ui/views/settings_api_bubble_helper_views.h"
 #include "chrome/browser/ui/views/toolbar/home_button.h"
 #include "chrome/browser/ui/views/toolbar/toolbar_view.h"
 #include "chrome/common/extensions/manifest_handlers/settings_overrides_handler.h"
+#include "chrome/common/url_constants.h"
+#include "content/public/browser/browser_url_handler.h"
 
 namespace {
 
 void ShowSettingsApiBubble(extensions::SettingsApiOverrideType type,
                            const std::string& extension_id,
                            Profile* profile,
                            views::View* anchor_view,
                            views::BubbleBorder::Arrow arrow) {
   scoped_ptr<extensions::SettingsApiBubbleController> settings_api_bubble(
       new extensions::SettingsApiBubbleController(profile, type));
@@ skipping 52 matching lines @@
               chrome::FindBrowserWithWebContents(web_contents))->toolbar();
       ShowSettingsApiBubble(BUBBLE_TYPE_SEARCH_ENGINE,
                             extension->id(),
                             profile,
                             toolbar->app_menu(),
                             views::BubbleBorder::TOP_RIGHT);
     }
   }
 }
 
+void MaybeShowExtensionControlledNewTabPage(Browser* browser) {
+  GURL ntp_url(chrome::kChromeUINewTabURL);
+  bool ignored_param;
+  content::BrowserURLHandler::GetInstance()->RewriteURLIfNecessary(
+      &ntp_url,
+      browser->tab_strip_model()->GetActiveWebContents()->GetBrowserContext(),
+      &ignored_param);
+  if (!ntp_url.SchemeIs("chrome-extension"))
+    return;  // Not being overridden by an extension.
+
+  scoped_ptr<extensions::NtpControlledBubbleController> ntp_controlled_bubble(

[Yoyo Zhou, 2014/04/23 00:04:24]

nit: don't need extensions::

[Finnur, 2014/04/23 13:51:35]

Good point (this function moved around a bit during previous unsuccessful
attempts at re-factoring to get rid of the nasty DEPS change). Done now.

+      new extensions::NtpControlledBubbleController(browser->profile()));
+  if (!ntp_controlled_bubble->ShouldShow(ntp_url.host()))
+    return;
+
+  extensions::NtpControlledBubbleController* controller =
+      ntp_controlled_bubble.get();
+  extensions::ExtensionMessageBubbleView* bubble_delegate =
+      new extensions::ExtensionMessageBubbleView(
+          BrowserView::GetBrowserViewForBrowser(browser)->toolbar()->app_menu(),
+          views::BubbleBorder::TOP_RIGHT,
+          ntp_controlled_bubble.PassAs<
+              extensions::ExtensionMessageBubbleController>());
+  views::BubbleDelegateView::CreateBubble(bubble_delegate);
+  controller->Show(bubble_delegate);
+}
+
 }  // namespace extensions