Add an additional VDA::Flush() mode to return all allocated buffers.

content/common/gpu/media/v4l2_slice_video_decode_accelerator.h

 // Copyright 2015 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_COMMON_GPU_MEDIA_V4L2_SLICE_VIDEO_DECODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_V4L2_SLICE_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <linux/videodev2.h>
 #include <stddef.h>
 #include <stdint.h>
@@ skipping 398 matching lines @@
   // BitstreamBuffer currently being processed.
   std::unique_ptr<BitstreamBufferRef> decoder_current_bitstream_buffer_;
 
   // Queue storing decode surfaces ready to be output as soon as they are
   // decoded. The surfaces must be output in order they are queued.
   std::queue<scoped_refptr<V4L2DecodeSurface>> decoder_display_queue_;
 
   // Decoder state.
   State state_;
 
-  Config::OutputMode output_mode_;
+  // VDA::Config we were Initialize()d with.
+  Config config_;
 
   // If any of these are true, we are waiting for the device to finish decoding
   // all previously-queued frames, so we can finish the flush/reset/surface
   // change flows. These can stack.
   bool decoder_flushing_;
   bool decoder_resetting_;
   bool surface_set_change_pending_;
 
   // Hardware accelerators.
   // TODO(posciak): Try to have a superclass here if possible.
@@ skipping 34 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(V4L2SliceVideoDecodeAccelerator);
 };
 
 class V4L2H264Picture;
 class V4L2VP8Picture;
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_V4L2_SLICE_VIDEO_DECODE_ACCELERATOR_H_