Chromecast: use CastContent{Browser,Renderer}Client as a base class.

chromecast/browser/cast_content_browser_client.h

 // Copyright 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.
 
 #ifndef CHROMECAST_BROWSER_CAST_CONTENT_BROWSER_CLIENT_H_
 #define CHROMECAST_BROWSER_CAST_CONTENT_BROWSER_CLIENT_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 24 matching lines @@
 class MediaPipelineDeviceParams;
 }
 
 namespace shell {
 
 class CastBrowserMainParts;
 class URLRequestContextFactory;
 
 class CastContentBrowserClient: public content::ContentBrowserClient {
  public:
-  CastContentBrowserClient();
+  // Creates an implementation of CastContentBrowserClient. Platform should
+  // link in an implementation as needed.
+  static scoped_ptr<CastContentBrowserClient> Create();
+
   ~CastContentBrowserClient() override;
 
   // Appends extra command line arguments before launching a new process.
   void PlatformAppendExtraCommandLineSwitches(base::CommandLine* command_line);
 
   // Returns any BrowserMessageFilters from the platform implementation that
   // should be added when launching a new render process.
   std::vector<scoped_refptr<content::BrowserMessageFilter>>
   PlatformGetBrowserMessageFilters();
 
@@ skipping 56 matching lines @@
   void GetAdditionalMappedFilesForChildProcess(
       const base::CommandLine& command_line,
       int child_process_id,
       content::FileDescriptorInfo* mappings) override;
 #if defined(OS_ANDROID) && defined(VIDEO_HOLE)
   content::ExternalVideoSurfaceContainer*
   OverrideCreateExternalVideoSurfaceContainer(
       content::WebContents* web_contents) override;
 #endif  // defined(OS_ANDROID) && defined(VIDEO_HOLE)
 
+ protected:
+  CastContentBrowserClient();
+
  private:
   void AddNetworkHintsMessageFilter(int render_process_id,
                                     net::URLRequestContext* context);
 
   net::X509Certificate* SelectClientCertificateOnIOThread(
       GURL requesting_url,
       int render_process_id);
 
   scoped_ptr<::media::AudioManagerFactory> PlatformCreateAudioManagerFactory();
 
@@ skipping 14 matching lines @@
 
   scoped_ptr<URLRequestContextFactory> url_request_context_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CastContentBrowserClient);
 };
 
 }  // namespace shell
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_CAST_CONTENT_BROWSER_CLIENT_H_