media: CdmFactory creates CDM (MediaKeys) asynchronously.

media/blink/webmediaplayer_impl.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 MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 #define MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 206 matching lines @@
   scoped_refptr<VideoFrame> GetCurrentFrameFromCompositor();
 
   // Called when the demuxer encounters encrypted streams.
   void OnEncryptedMediaInitData(EmeInitDataType init_data_type,
                                 const std::vector<uint8>& init_data);
 
   // Called when a decoder detects that the key needed to decrypt the stream
   // is not available.
   void OnWaitingForDecryptionKey();
 
-  void SetCdm(CdmContext* cdm_context, const CdmAttachedCB& cdm_attached_cb);
+  // Sets |cdm_context| on the pipeline and fires |cdm_attached_cb| when done.
+  // Parameter order is reversed for easy binding.
+  void SetCdm(const CdmAttachedCB& cdm_attached_cb, CdmContext* cdm_context);
 
   // Called when a CDM has been attached to the |pipeline_|.
   void OnCdmAttached(blink::WebContentDecryptionModuleResult result,
                      bool success);
 
   // Updates |paused_time_| to the current media time with consideration for the
   // |ended_| state by clamping current time to duration upon |ended_|.
   void UpdatePausedTime();
 
   blink::WebLocalFrame* frame_;
@@ skipping 88 matching lines @@
   EncryptedMediaPlayerSupport encrypted_media_support_;
 
   scoped_ptr<RendererFactory> renderer_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_