Encrypted Media: Support Audio Decrypt-Only.

webkit/media/webmediaplayer_impl.cc

Index: webkit/media/webmediaplayer_impl.cc
diff --git a/webkit/media/webmediaplayer_impl.cc b/webkit/media/webmediaplayer_impl.cc
index f5e63331a239b83b285e7a5aa1b881c4b48036b5..a9e5ff937cc3a7fc3bd780214c4fe8990f6412d4 100644
--- a/webkit/media/webmediaplayer_impl.cc
+++ b/webkit/media/webmediaplayer_impl.cc
@@ -1124,12 +1124,21 @@ void WebMediaPlayerImpl::NotifyDownloading(bool is_downloading) {
 
 void WebMediaPlayerImpl::StartPipeline() {
   starting_ = true;
+
+  media::SetDecryptorReadyCB set_decryptor_ready_cb;
+  if (decryptor_) {
+    set_decryptor_ready_cb =
+        base::Bind(&ProxyDecryptor::RegisterDecryptorReadyNotification,
+                   base::Unretained(decryptor_.get()));
+  }
+
   pipeline_->Start(
       filter_collection_.Pass(),
       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineEnded),
       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineError),
       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineSeek),
-      BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineBufferingState));
+      BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineBufferingState),
+      set_decryptor_ready_cb);
 }
 
 void WebMediaPlayerImpl::SetNetworkState(WebMediaPlayer::NetworkState state) {