Introduce a client minimum picture pool size

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 3dfd8606b82445706beed09b2ec7f3484cc52185..caac1078ebd65895e4f8f780c51761b79f3c2908 100644
--- a/content/common/gpu/media/v4l2_video_decode_accelerator.h
+++ b/content/common/gpu/media/v4l2_video_decode_accelerator.h
@@ -84,6 +84,7 @@ class CONTENT_EXPORT V4L2VideoDecodeAccelerator
   // media::VideoDecodeAccelerator implementation.
   // Note: Initialize() and Destroy() are synchronous.
   bool Initialize(media::VideoCodecProfile profile,
+                  uint32 min_picture_count,
                   Client* client) override;
   void Decode(const media::BitstreamBuffer& bitstream_buffer) override;
   void AssignPictureBuffers(
@@ -451,6 +452,9 @@ class CONTENT_EXPORT V4L2VideoDecodeAccelerator
   // Chosen output format.
   uint32_t output_format_fourcc_;
 
+  // The minimum number of picture buffers to allocate.
+  uint32_t min_picture_count_;
+
   // The WeakPtrFactory for |weak_this_|.
   base::WeakPtrFactory<V4L2VideoDecodeAccelerator> weak_this_factory_;