Mojo multiple command buffer support and sample

mojo/services/native_viewport/gpu_impl.cc

+// Copyright 2013 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/native_viewport/gpu_impl.h"
+
+#include "gpu/command_buffer/service/mailbox_manager.h"
+#include "mojo/services/gles2/command_buffer_impl.h"
+#include "mojo/services/public/cpp/geometry/geometry_type_converters.h"
+#include "ui/gl/gl_share_group.h"
+
+namespace mojo {
+
+GpuImpl::GpuImpl(
+    const scoped_refptr<gfx::GLShareGroup>& share_group,
+    const scoped_refptr<gpu::gles2::MailboxManager> mailbox_manager)
+    : share_group_(share_group), mailbox_manager_(mailbox_manager) {
+}
+
+GpuImpl::~GpuImpl() {
+}
+
+void GpuImpl::CreateOnscreenGLES2Context(
+    uint64_t native_viewport_id,
+    SizePtr size,
+    InterfaceRequest<CommandBuffer> command_buffer_request) {
+  gfx::AcceleratedWidget widget = bit_cast<gfx::AcceleratedWidget>(
+      static_cast<uintptr_t>(native_viewport_id));
+  BindToRequest(new CommandBufferImpl(widget,
+                                      size.To<gfx::Size>(),
+                                      share_group_.get(),
+                                      mailbox_manager_.get()),
+                &command_buffer_request);
+}
+
+void GpuImpl::CreateOffscreenGLES2Context(
+    InterfaceRequest<CommandBuffer> command_buffer_request) {
+  BindToRequest(
+      new CommandBufferImpl(share_group_.get(), mailbox_manager_.get()),
+      &command_buffer_request);
+}
+
+}  // namespace mojo