Make Android notifications rely on the native notification flag

chrome/browser/notifications/notification_common.cc

 // Copyright 2016 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/notifications/notification_common.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/chrome_pages.h"
 #include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
 #include "chrome/common/chrome_switches.h"
 #include "content/public/browser/browser_context.h"
 
 // static
 void NotificationCommon::OpenNotificationSettings(
     content::BrowserContext* browser_context) {
 #if defined(OS_ANDROID)
+  // Android settings are opened directly from Java
   NOTIMPLEMENTED();
 #else
   Profile* profile = Profile::FromBrowserContext(browser_context);
   DCHECK(profile);
 
   if (switches::SettingsWindowEnabled()) {
     chrome::ShowContentSettingsExceptionsInWindow(
         profile, CONTENT_SETTINGS_TYPE_NOTIFICATIONS);
   } else {
     chrome::ScopedTabbedBrowserDisplayer browser_displayer(profile);
     chrome::ShowContentSettingsExceptions(browser_displayer.browser(),
                                           CONTENT_SETTINGS_TYPE_NOTIFICATIONS);
   }
 #endif  // defined(OS_ANDROID)
 }