Decryptors can report kNoKey to WebMediaPlayer

media/filters/vpx_video_decoder.cc

Index: media/filters/vpx_video_decoder.cc
diff --git a/media/filters/vpx_video_decoder.cc b/media/filters/vpx_video_decoder.cc
index dd436796ce1c20500cc5dc38f251fb0b81b9caac..42b4e033d0b85893db20ae80cce980fdece1d983 100644
--- a/media/filters/vpx_video_decoder.cc
+++ b/media/filters/vpx_video_decoder.cc
@@ -207,10 +207,12 @@ std::string VpxVideoDecoder::GetDisplayName() const {
   return "VpxVideoDecoder";
 }
 
-void VpxVideoDecoder::Initialize(const VideoDecoderConfig& config,
-                                 bool low_delay,
-                                 const PipelineStatusCB& status_cb,
-                                 const OutputCB& output_cb) {
+void VpxVideoDecoder::Initialize(
+    const VideoDecoderConfig& config,
+    bool /* low_delay */,
+    const PipelineStatusCB& status_cb,
+    const OutputCB& output_cb,
+    const base::Closure& /* waiting_for_encryption_key_cb */) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK(config.IsValidConfig());
   DCHECK(!config.is_encrypted());