Refactor notification operation functionality out of PNS

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)
+  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)
+}