RTCVideoDecoder: add Destroy() static method for RTCVideoDecoderFactory

content/renderer/media/rtc_video_decoder.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 CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_H_
 #define CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 33 matching lines @@
 // which VDA::Client methods run on. webrtc::VideoDecoder methods run on WebRTC
 // DecodingThread or Chrome_libJingle_WorkerThread, which are trampolined to
 // |vda_message_loop_|. Decode() is non-blocking and queues the buffers. Decoded
 // frames are delivered to WebRTC on |vda_message_loop_|.
 class CONTENT_EXPORT RTCVideoDecoder
     : NON_EXPORTED_BASE(public webrtc::VideoDecoder),
       public media::VideoDecodeAccelerator::Client {
  public:
   ~RTCVideoDecoder() override;
 
-  // Creates a RTCVideoDecoder. Returns NULL if failed. The video decoder will
-  // run on the message loop of |factories|.
+  // Creates a RTCVideoDecoder on the message loop of |factories|. Returns NULL
+  // if failed. The video decoder will run on the message loop of |factories|.
   static scoped_ptr<RTCVideoDecoder> Create(
       webrtc::VideoCodecType type,
       media::GpuVideoAcceleratorFactories* factories);
+  // Destroys |decoder| on the loop of |factories|
+  static void Destroy(webrtc::VideoDecoder* decoder,
+                      media::GpuVideoAcceleratorFactories* factories);
 
   // webrtc::VideoDecoder implementation.
   // Called on WebRTC DecodingThread.
   int32_t InitDecode(const webrtc::VideoCodec* codecSettings,
                      int32_t numberOfCores) override;
   // Called on WebRTC DecodingThread.
   int32_t Decode(const webrtc::EncodedImage& inputImage,
                  bool missingFrames,
                  const webrtc::RTPFragmentationHeader* fragmentation,
                  const webrtc::CodecSpecificInfo* codecSpecificInfo = NULL,
@@ skipping 209 matching lines @@
   // Must be destroyed, or invalidated, on |vda_loop_proxy_|
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<RTCVideoDecoder> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RTCVideoDecoder);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_H_