Start pulling away notification logic from ChromeContentBrowserClient.

chrome/browser/chrome_content_browser_client.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_
 #define CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_
 
 #include <set>
 #include <string>
 #include <utility>
@@ skipping 162 matching lines @@
       int render_process_id,
       int render_frame_id,
       net::SSLCertRequestInfo* cert_request_info,
       const base::Callback<void(net::X509Certificate*)>& callback) override;
   void AddCertificate(net::CertificateMimeType cert_type,
                       const void* cert_data,
                       size_t cert_size,
                       int render_process_id,
                       int render_frame_id) override;
   content::MediaObserver* GetMediaObserver() override;
-  blink::WebNotificationPermission CheckDesktopNotificationPermission(
-      const GURL& source_origin,
-      content::ResourceContext* context,
-      int render_process_id) override;
-  void ShowDesktopNotification(
-      const content::ShowDesktopNotificationHostMsgParams& params,
-      content::BrowserContext* browser_context,
-      int render_process_id,
-      scoped_ptr<content::DesktopNotificationDelegate> delegate,
-      base::Closure* cancel_callback) override;
+  content::PlatformNotificationService* GetPlatformNotificationService()
+      override;
   void RequestPermission(
       content::PermissionType permission,
       content::WebContents* web_contents,
       int bridge_id,
       const GURL& requesting_frame,
       bool user_gesture,
       const base::Callback<void(bool)>& result_callback) override;
   content::PermissionStatus GetPermissionStatus(
       content::PermissionType permission,
       content::BrowserContext* browser_context,
@@ skipping 133 matching lines @@
   std::vector<ChromeContentBrowserClientParts*> extra_parts_;
 
   base::WeakPtrFactory<ChromeContentBrowserClient> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeContentBrowserClient);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_