Run VDA::Decode on GPU IO thread if VDA supports it.

content/common/gpu/gpu_command_buffer_stub.cc

 // 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.
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/hash.h"
 #include "base/memory/shared_memory.h"
@@ skipping 704 matching lines @@
   scheduler_->PutChanged();
 }
 
 void GpuCommandBufferStub::OnCreateVideoDecoder(
     media::VideoCodecProfile profile,
     IPC::Message* reply_message) {
   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnCreateVideoDecoder");
   int decoder_route_id = channel_->GenerateRouteID();
   GpuVideoDecodeAccelerator* decoder =
       new GpuVideoDecodeAccelerator(decoder_route_id, this);
-  decoder->Initialize(profile, reply_message);
+  decoder->Initialize(profile, reply_message, channel_->io_message_loop());
   // decoder is registered as a DestructionObserver of this stub and will
   // self-delete during destruction of this stub.
 }
 
 void GpuCommandBufferStub::OnSetSurfaceVisible(bool visible) {
   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnSetSurfaceVisible");
   if (memory_manager_client_state_)
     memory_manager_client_state_->SetVisible(visible);
 }
 
@@ skipping 205 matching lines @@
       command_buffer_->GetState().error == gpu::error::kLostContext)
     return;
 
   command_buffer_->SetContextLostReason(gpu::error::kUnknown);
   if (decoder_)
     decoder_->LoseContext(GL_UNKNOWN_CONTEXT_RESET_ARB);
   command_buffer_->SetParseError(gpu::error::kLostContext);
 }
 
 }  // namespace content