Factor out authorization from AudioRendererHost.

content/browser/renderer_host/media/media_stream_manager.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.
 
 // MediaStreamManager is used to open/enumerate media capture devices (video
 // supported now). Call flow:
 // 1. GenerateStream is called when a render process wants to use a capture
 //    device.
 // 2. MediaStreamManager will ask MediaStreamUIController for permission to
 //    use devices and for which device to use.
@@ skipping 234 matching lines @@
                                              const url::Origin& security_origin,
                                              const std::string& raw_unique_id);
 
   // Convenience method to check if |device_guid| is an HMAC of
   // |raw_device_id| for |security_origin|.
   static bool DoesMediaDeviceIDMatchHMAC(const std::string& salt,
                                          const url::Origin& security_origin,
                                          const std::string& device_guid,
                                          const std::string& raw_unique_id);
 
+  static bool IsValidDeviceId(const std::string& device_id);
+
   // Returns true if the renderer process identified with |render_process_id|
   // is allowed to access |origin|.
   static bool IsOriginAllowed(int render_process_id, const url::Origin& origin);
 
   // Set whether the capturing is secure for the capturing session with given
   // |session_id|, |render_process_id|, and the MediaStreamType |type|.
   void SetCapturingLinkSecured(int render_process_id,
                                int session_id,
                                content::MediaStreamType type,
                                bool is_secure);
@@ skipping 193 matching lines @@
   std::vector<MediaStreamRequester*> device_change_subscribers_;
 
   GenerateStreamTestCallback generate_stream_test_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_MANAGER_H_