Introduce command buffer control thread

mojo/services/gles2/gpu_impl.cc

 // Copyright 2014 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 "mojo/services/gles2/gpu_impl.h"
 
 #include "gpu/command_buffer/service/mailbox_manager.h"
+#include "gpu/command_buffer/service/mailbox_manager_impl.h"
 #include "mojo/converters/geometry/geometry_type_converters.h"
 #include "mojo/services/gles2/command_buffer_driver.h"
 #include "mojo/services/gles2/command_buffer_impl.h"
 #include "ui/gl/gl_share_group.h"
+#include "ui/gl/gl_surface.h"
 
 namespace mojo {
 
-GpuImpl::GpuImpl(
-    InterfaceRequest<Gpu> request,
-    const scoped_refptr<gfx::GLShareGroup>& share_group,
-    const scoped_refptr<gpu::gles2::MailboxManager> mailbox_manager)
-    : share_group_(share_group),
-      mailbox_manager_(mailbox_manager),
-      binding_(this, request.Pass()) {
+GpuImpl::State::State()
+    : control_thread_("gpu_command_buffer_control"),
+      share_group_(new gfx::GLShareGroup),
+      mailbox_manager_(new gpu::gles2::MailboxManagerImpl) {
+  control_thread_.Start();
+}
+
+GpuImpl::State::~State() {
+}
+
+GpuImpl::GpuImpl(InterfaceRequest<Gpu> request,
+                 const scoped_refptr<State>& state)
+    : binding_(this, request.Pass()), state_(state) {
 }
 
 GpuImpl::~GpuImpl() {
 }
 
 void GpuImpl::CreateOnscreenGLES2Context(
     uint64_t native_viewport_id,
     SizePtr size,
     InterfaceRequest<CommandBuffer> request) {
   gfx::AcceleratedWidget widget = bit_cast<gfx::AcceleratedWidget>(
       static_cast<uintptr_t>(native_viewport_id));
-  new CommandBufferImpl(request.Pass(),
+  new CommandBufferImpl(request.Pass(), state_->control_task_runner(),
                         make_scoped_ptr(new CommandBufferDriver(
-                            widget, size.To<gfx::Size>(), share_group_.get(),
-                            mailbox_manager_.get())));
+                            widget, size.To<gfx::Size>(), state_->share_group(),
+                            state_->mailbox_manager())));
 }
 
 void GpuImpl::CreateOffscreenGLES2Context(
     InterfaceRequest<CommandBuffer> request) {
-  new CommandBufferImpl(request.Pass(),
+  new CommandBufferImpl(request.Pass(), state_->control_task_runner(),
                         make_scoped_ptr(new CommandBufferDriver(
-                            share_group_.get(), mailbox_manager_.get())));
+                            state_->share_group(), state_->mailbox_manager())));
 }
 
 }  // namespace mojo