Encrypted Media: Implement IPC based SetCdm().

content/renderer/media/android/proxy_media_keys.h

 // Copyright 2013 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 CONTENT_RENDERER_MEDIA_ANDROID_PROXY_MEDIA_KEYS_H_
 #define CONTENT_RENDERER_MEDIA_ANDROID_PROXY_MEDIA_KEYS_H_
 
 #include "base/basictypes.h"
 #include "media/base/media_keys.h"
 
@@ skipping 24 matching lines @@
   virtual bool CreateSession(uint32 session_id,
                              const std::string& content_type,
                              const uint8* init_data,
                              int init_data_length) OVERRIDE;
   virtual void LoadSession(uint32 session_id,
                            const std::string& web_session_id) OVERRIDE;
   virtual void UpdateSession(uint32 session_id,
                              const uint8* response,
                              int response_length) OVERRIDE;
   virtual void ReleaseSession(uint32 session_id) OVERRIDE;
+  virtual int GetCdmId() OVERRIDE;

[ddorwin, 2014/03/11 18:05:14]

This will not be in the base class, but the factory will use it when it knows it
has created this object.

We could use a Create method that returns the ID. I'm not sure whether that will
be better or worse at the factory call site.

[xhwang, 2014/03/12 01:07:52]

Done. I am keeping a GetCdmId() function in ProxyMediaKeys because the class
needs to store the cdm_id_ anyways (for sending IPCs).

 
   // Callbacks.
   void OnSessionCreated(uint32 session_id, const std::string& web_session_id);
   void OnSessionMessage(uint32 session_id,
                         const std::vector<uint8>& message,
                         const std::string& destination_url);
   void OnSessionReady(uint32 session_id);
   void OnSessionClosed(uint32 session_id);
   void OnSessionError(uint32 session_id,
                       media::MediaKeys::KeyError error_code,
                       uint32 system_code);
 
  private:
   RendererMediaPlayerManager* manager_;
   int cdm_id_;
   media::SessionCreatedCB session_created_cb_;
   media::SessionMessageCB session_message_cb_;
   media::SessionReadyCB session_ready_cb_;
   media::SessionClosedCB session_closed_cb_;
   media::SessionErrorCB session_error_cb_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyMediaKeys);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_ANDROID_PROXY_MEDIA_KEYS_H_