Introduce a client minimum picture pool size

content/common/gpu/media/v4l2_slice_video_decode_accelerator.h

Index: content/common/gpu/media/v4l2_slice_video_decode_accelerator.h
diff --git a/content/common/gpu/media/v4l2_slice_video_decode_accelerator.h b/content/common/gpu/media/v4l2_slice_video_decode_accelerator.h
index dd12487bb2ce214991d6c2f57940b4e80790e629..735965f553e761c8d285c8c73d78a800bf9004d9 100644
--- a/content/common/gpu/media/v4l2_slice_video_decode_accelerator.h
+++ b/content/common/gpu/media/v4l2_slice_video_decode_accelerator.h
@@ -43,6 +43,7 @@ class CONTENT_EXPORT V4L2SliceVideoDecodeAccelerator
 
   // media::VideoDecodeAccelerator implementation.
   bool Initialize(media::VideoCodecProfile profile,
+                  uint32 min_picture_count,
                   VideoDecodeAccelerator::Client* client) override;
   void Decode(const media::BitstreamBuffer& bitstream_buffer) override;
   void AssignPictureBuffers(
@@ -326,6 +327,9 @@ class CONTENT_EXPORT V4L2SliceVideoDecodeAccelerator
   gfx::Size visible_size_;
   gfx::Size coded_size_;
 
+  // Minimum number of picture buffers to allocate.
+  uint32 min_picture_count_;
+
   struct BitstreamBufferRef;
   // Input queue of stream buffers coming from the client.
   std::queue<linked_ptr<BitstreamBufferRef>> decoder_input_queue_;