Call NotifyDemuxerReady() only once while keys are added.

webkit/renderer/media/android/webmediaplayer_android.cc

 // 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.
 
 #include "webkit/renderer/media/android/webmediaplayer_android.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
@@ skipping 1018 matching lines @@
   proxy_->CancelKeyRequest(player_id_, session_id.utf8());
 #endif  // #if defined(GOOGLE_TV)
 
   return WebMediaPlayer::MediaKeyExceptionNoError;
 }
 
 void WebMediaPlayerAndroid::OnKeyAdded(const std::string& session_id) {
   EmeUMAHistogramCounts(current_key_system_.utf8(), "KeyAdded", 1);
 
   if (media_source_delegate_)
-    media_source_delegate_->NotifyDemuxerReady(current_key_system_.utf8());
+    media_source_delegate_->NotifyKeyAdded(
+        current_key_system_.utf8(), session_id);

[xhwang, 2013/06/20 17:30:50]

Why is MSD interested in what key system it is?

[kjyoun, 2013/06/21 00:05:39]

MSD needs to know key_system in order to pass it to demuxer_stream_player, 
which pass this info to platform's video path.

FYI, key_system and other crypto-related info is wrapped in
MediaPlayerHostMsg_DemuxerReady_Params 
On 2013/06/20 17:30:50, xhwang wrote:

 
   client_->keyAdded(current_key_system_, WebString::fromUTF8(session_id));
 }
 
 void WebMediaPlayerAndroid::OnKeyError(const std::string& session_id,
                                        media::MediaKeys::KeyError error_code,
                                        int system_code) {
   EmeUMAHistogramEnumeration(current_key_system_.utf8(), "KeyError",
                              error_code, media::MediaKeys::kMaxKeyError);
 
@@ skipping 70 matching lines @@
 
 void WebMediaPlayerAndroid::exitFullscreen() {
   proxy_->ExitFullscreen(player_id_);
 }
 
 bool WebMediaPlayerAndroid::canEnterFullscreen() const {
   return manager_->CanEnterFullscreen(frame_);
 }
 
 }  // namespace webkit_media