Bug 1056408 - Flush local task queues in AppleDecoderModule. r=cpearce

We could still have data pending submission on the local task queue
which would be submitted after we were supposed to have flushed.

content/media/fmp4/apple/AppleATDecoder.cpp

@@ -129,6 +129,7 @@ nsresult
 AppleATDecoder::Flush()
 {
   LOG("Flushing AudioToolbox AAC decoder");
+  mTaskQueue->Flush();
   OSStatus rv = AudioConverterReset(mConverter);
   if (rv) {
     LOG("Error %d resetting AudioConverter", rv);

content/media/fmp4/apple/AppleVTDecoder.cpp

@@ -111,6 +111,7 @@ AppleVTDecoder::Input(mp4_demuxer::MP4Sample* aSample)
 nsresult
 AppleVTDecoder::Flush()
 {
+  mTaskQueue->Flush();
   nsresult rv = WaitForAsynchronousFrames();
   if (NS_FAILED(rv)) {
     LOG("AppleVTDecoder::Drain failed waiting for platform decoder.");