Deliver video frames on Android, on the decode thread.

webrtc/media/engine/videodecodersoftwarefallbackwrapper.cc

Index: webrtc/media/engine/videodecodersoftwarefallbackwrapper.cc
diff --git a/webrtc/media/engine/videodecodersoftwarefallbackwrapper.cc b/webrtc/media/engine/videodecodersoftwarefallbackwrapper.cc
index f5b54e11d3336493297a91bdc07d3aac426e1e46..e8fa06468ce1926a9d2f756cdeaa16d58826db3e 100644
--- a/webrtc/media/engine/videodecodersoftwarefallbackwrapper.cc
+++ b/webrtc/media/engine/videodecodersoftwarefallbackwrapper.cc
@@ -138,6 +138,14 @@ bool VideoDecoderSoftwareFallbackWrapper::PrefersLateDecoding() const {
   return decoder_->PrefersLateDecoding();
 }
 
+#if defined(WEBRTC_ANDROID)
+void VideoDecoderSoftwareFallbackWrapper::PollDecodedFrames() {
+  if (fallback_decoder_)
+    return fallback_decoder_->PollDecodedFrames();
+  return decoder_->PollDecodedFrames();
+}
+#endif
+
 const char* VideoDecoderSoftwareFallbackWrapper::ImplementationName() const {
   if (fallback_decoder_)
     return fallback_implementation_name_.c_str();