Minor robustness improvements for VTVideoDecodeAccelerator.

content/common/gpu/media/vt_video_decode_accelerator.cc

Index: content/common/gpu/media/vt_video_decode_accelerator.cc
diff --git a/content/common/gpu/media/vt_video_decode_accelerator.cc b/content/common/gpu/media/vt_video_decode_accelerator.cc
index e18412c114c9ed80cda02d5dc3fa2bd22eab42b1..2504b25d6746cb707d3110364a6cd591337e87e9 100644
--- a/content/common/gpu/media/vt_video_decode_accelerator.cc
+++ b/content/common/gpu/media/vt_video_decode_accelerator.cc
@@ -632,7 +632,8 @@ void VTVideoDecodeAccelerator::Output(
     CVImageBufferRef image_buffer) {
   if (status) {
     NOTIFY_STATUS("Decoding", status);
-  } else if (CFGetTypeID(image_buffer) != CVPixelBufferGetTypeID()) {
+  } else if (!image_buffer ||

[DaleCurtis, 2015/02/04 22:38:52]

Needs a comment if this is unexpected.

+             (CFGetTypeID(image_buffer) != CVPixelBufferGetTypeID())) {
     DLOG(ERROR) << "Decoded frame is not a CVPixelBuffer";
     NotifyError(PLATFORM_FAILURE);
   } else {
@@ -715,7 +716,10 @@ void VTVideoDecodeAccelerator::ProcessWorkQueues() {
   switch (state_) {
     case STATE_DECODING:
       // TODO(sandersd): Batch where possible.
-      while (ProcessReorderQueue() || ProcessTaskQueue());
+      while (state_ == STATE_DECODING) {
+        if (!ProcessReorderQueue() && !ProcessTaskQueue())
+          break;
+      }
       return;
 
     case STATE_ERROR: