RTCVideoDecoder: add Destroy() static method for RTCVideoDecoderFactory

content/renderer/media/rtc_video_decoder.cc

Index: content/renderer/media/rtc_video_decoder.cc
diff --git a/content/renderer/media/rtc_video_decoder.cc b/content/renderer/media/rtc_video_decoder.cc
index 2381c770392b1f5c88dbd54d10ef0556e6be489d..aebe9f2846c8e5e72cd12c73af4ccacfe66cf01d 100644
--- a/content/renderer/media/rtc_video_decoder.cc
+++ b/content/renderer/media/rtc_video_decoder.cc
@@ -116,6 +116,12 @@ scoped_ptr<RTCVideoDecoder> RTCVideoDecoder::Create(
   return decoder.Pass();
 }
 
+// static
+void RTCVideoDecoder::Destroy(webrtc::VideoDecoder* decoder,
+                              media::GpuVideoAcceleratorFactories* factories) {
+  factories->GetTaskRunner()->DeleteSoon(FROM_HERE, decoder);
+}
+
 int32_t RTCVideoDecoder::InitDecode(const webrtc::VideoCodec* codecSettings,
                                     int32_t /*numberOfCores*/) {
   DVLOG(2) << "InitDecode";