Add code to prompt for browser login during app notification setup

chrome/browser/extensions/extension_tab_helper.cc

Index: chrome/browser/extensions/extension_tab_helper.cc
diff --git a/chrome/browser/extensions/extension_tab_helper.cc b/chrome/browser/extensions/extension_tab_helper.cc
index 46a6522bb9bae8b35aca702b49e6c0d204738061..a5b726db7b3dde65dc32fe1fd7de46a384ad2bc0 100644
--- a/chrome/browser/extensions/extension_tab_helper.cc
+++ b/chrome/browser/extensions/extension_tab_helper.cc
@@ -187,12 +187,16 @@ void ExtensionTabHelper::OnGetAppNotifyChannel(
     return;
   }
 
+  AppNotifyChannelUI* ui = new AppNotifyChannelUIImpl(
+      GetBrowser(), tab_contents_wrapper(), extension->name());
+
   scoped_refptr<AppNotifyChannelSetup> channel_setup(
       new AppNotifyChannelSetup(profile,
                                 client_id,
                                 requestor_url,
                                 return_route_id,
                                 callback_id,
+                                ui,
                                 this->AsWeakPtr()));
   channel_setup->Start();
   // We'll get called back in AppNotifyChannelSetupComplete.