Add offset support to BitstreamBuffer.

content/common/gpu/media/v4l2_jpeg_decode_accelerator.h

Index: content/common/gpu/media/v4l2_jpeg_decode_accelerator.h
diff --git a/content/common/gpu/media/v4l2_jpeg_decode_accelerator.h b/content/common/gpu/media/v4l2_jpeg_decode_accelerator.h
index 435808012ecd5b31c3da0df263bd2bdb283248bc..bef33b22c103b738011e906316126fc1e82c334a 100644
--- a/content/common/gpu/media/v4l2_jpeg_decode_accelerator.h
+++ b/content/common/gpu/media/v4l2_jpeg_decode_accelerator.h
@@ -18,6 +18,7 @@
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread.h"
 #include "content/common/content_export.h"
+#include "content/common/gpu/media/shared_memory_region.h"
 #include "content/common/gpu/media/v4l2_device.h"
 #include "media/base/bitstream_buffer.h"
 #include "media/base/video_frame.h"
@@ -58,16 +59,16 @@ class CONTENT_EXPORT V4L2JpegDecodeAccelerator
   // the time of submission we may not have one available (and don't need one
   // to submit input to the device).
   struct JobRecord {
-    JobRecord(media::BitstreamBuffer bitstream_buffer,
+    JobRecord(const media::BitstreamBuffer& bitstream_buffer,
               scoped_refptr<media::VideoFrame> video_frame);
     ~JobRecord();
 
-    // Input image buffer.
-    media::BitstreamBuffer bitstream_buffer;
+    // Input image buffer ID.
+    int32_t bitstream_buffer_id;
+    // Memory mapped from |bitstream_buffer|.
+    SharedMemoryRegion shm;
     // Output frame buffer.
     scoped_refptr<media::VideoFrame> out_frame;
-    // Memory mapped from |bitstream_buffer|.
-    scoped_ptr<base::SharedMemory> shm;
   };
 
   void EnqueueInput();