media: Reland "Simplify {Audio|Video}Decoder initialization callback."

media/filters/vpx_video_decoder.h

 // Copyright (c) 2012 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_FILTERS_VPX_VIDEO_DECODER_H_
 #define MEDIA_FILTERS_VPX_VIDEO_DECODER_H_
 
 #include "base/callback.h"
 #include "media/base/demuxer_stream.h"
 #include "media/base/video_decoder.h"
@@ skipping 17 matching lines @@
 class MEDIA_EXPORT VpxVideoDecoder : public VideoDecoder {
  public:
   explicit VpxVideoDecoder(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
   ~VpxVideoDecoder() override;
 
   // VideoDecoder implementation.
   std::string GetDisplayName() const override;
   void Initialize(const VideoDecoderConfig& config,
                   bool low_delay,
-                  const PipelineStatusCB& status_cb,
+                  const InitCB& init_cb,
                   const OutputCB& output_cb) override;
   void Decode(const scoped_refptr<DecoderBuffer>& buffer,
               const DecodeCB& decode_cb) override;
   void Reset(const base::Closure& closure) override;
 
  private:
   enum DecoderState {
     kUninitialized,
     kNormal,
     kFlushCodec,
@@ skipping 34 matching lines @@
   scoped_refptr<MemoryPool> memory_pool_;
 
   VideoFramePool frame_pool_;
 
   DISALLOW_COPY_AND_ASSIGN(VpxVideoDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_VPX_VIDEO_DECODER_H_