Plumb decoded video pixel format from GPU process to renderer.

media/gpu/ipc/common/media_messages.h

 // Copyright 2016 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 "gpu/config/gpu_info.h"
 #include "gpu/ipc/common/gpu_param_traits_macros.h"
 #include "ipc/ipc_message_macros.h"
@@ skipping 96 matching lines @@
 
 // Notify the deferred initialization result.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoDecoderHostMsg_InitializationComplete,
                     bool) /* success */
 
 // Accelerated video decoder has consumed input buffer from transfer buffer.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoDecoderHostMsg_BitstreamBufferProcessed,
                     int32_t) /* Processed buffer ID */
 
 // Allocate video frames for output of the hardware video decoder.
-IPC_MESSAGE_ROUTED4(AcceleratedVideoDecoderHostMsg_ProvidePictureBuffers,
+IPC_MESSAGE_ROUTED5(AcceleratedVideoDecoderHostMsg_ProvidePictureBuffers,
+                    media::VideoPixelFormat, /* Picture buffer format */
                     int32_t,   /* Number of video frames to generate */
                     uint32_t,  /* Number of textures per frame */
                     gfx::Size, /* Requested size of buffer */
                     uint32_t)  /* Texture target */
 
 // Decoder reports that a picture is ready and buffer does not need to be passed
 // back to the decoder.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoDecoderHostMsg_DismissPictureBuffer,
                     int32_t) /* Picture buffer ID */
 
@@ skipping 102 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_t, /* bitstream_buffer_id */
                     media::JpegDecodeAccelerator::Error /* error */)