Introduce a client minimum picture pool size

content/common/gpu/gpu_messages.h

 // Copyright (c) 2012 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.
 
 // Multiply-included message file, hence no include guard here, but see below
 // for a much smaller-than-usual include guard section.
 
 #include <string>
 #include <vector>
 
@@ skipping 540 matching lines @@
                     base::SharedMemoryHandle /* transfer_buffer */,
                     uint32 /* size */)
 
 // Destroy a previously created transfer buffer.
 IPC_MESSAGE_ROUTED1(GpuCommandBufferMsg_DestroyTransferBuffer,
                     int32 /* id */)
 
 // Create and initialize a hardware video decoder using the specified route_id.
 // Created decoders should be freed with AcceleratedVideoDecoderMsg_Destroy when
 // no longer needed.
-IPC_SYNC_MESSAGE_ROUTED2_1(GpuCommandBufferMsg_CreateVideoDecoder,
+IPC_SYNC_MESSAGE_ROUTED3_1(GpuCommandBufferMsg_CreateVideoDecoder,
                            media::VideoCodecProfile /* profile */,
+                           uint32, /* min_picture_count */
                            int32, /* route_id */
                            bool /* succeeded */)
 
 // Create and initialize a hardware video encoder using the specified route_id.
 // Created encoders should be freed with AcceleratedVideoEncoderMsg_Destroy when
 // no longer needed.
 IPC_SYNC_MESSAGE_ROUTED5_1(GpuCommandBufferMsg_CreateVideoEncoder,
                            media::VideoFrame::Format /* input_format */,
                            gfx::Size /* input_visible_size */,
                            media::VideoCodecProfile /* output_profile */,
@@ skipping 219 matching lines @@
 IPC_MESSAGE_ROUTED0(AcceleratedJpegDecoderMsg_Destroy)
 
 //------------------------------------------------------------------------------
 // Accelerated JPEG Decoder Host Messages
 // These messages are sent from the GPU process to Browser process.
 //
 // Report decode status.
 IPC_MESSAGE_ROUTED2(AcceleratedJpegDecoderHostMsg_DecodeAck,
                     int32, /* bitstream_buffer_id */
                     media::JpegDecodeAccelerator::Error /* error */)