Add support for Tegra V4L2 VDA

content/common/gpu/media/v4l2_video_decode_accelerator.h

Index: content/common/gpu/media/v4l2_video_decode_accelerator.h
diff --git a/content/common/gpu/media/v4l2_video_decode_accelerator.h b/content/common/gpu/media/v4l2_video_decode_accelerator.h
index 0c6a4930714de29f9a10d33975255dc90d011f26..32af634cc9f1046dcbf248ed4f2cd724c441c5ac 100644
--- a/content/common/gpu/media/v4l2_video_decode_accelerator.h
+++ b/content/common/gpu/media/v4l2_video_decode_accelerator.h
@@ -11,6 +11,7 @@
 
 #include <queue>
 #include <vector>
+#include <linux/videodev2.h>
 
 #include "base/callback_forward.h"
 #include "base/memory/linked_ptr.h"
@@ -426,6 +427,12 @@ class CONTENT_EXPORT V4L2VideoDecodeAccelerator
   // The codec we'll be decoding for.
   media::VideoCodecProfile video_profile_;
 
+  // Stores the current format. This is used to check against
+  // the format received when we dequeue a RESOLUTION_CHANGE event.
+  // Resolution change sequence is only executed if the new format is different
+  // than the current_format_.
+  struct v4l2_format current_format_;
+
   DISALLOW_COPY_AND_ASSIGN(V4L2VideoDecodeAccelerator);
 };