Mus: Implement GpuMain mojo interface

services/ui/surfaces/display_compositor_factory.cc

+// 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.
+
+#include "services/ui/surfaces/display_compositor_factory.h"
+
+#include "gpu/command_buffer/client/gpu_memory_buffer_manager.h"
+#include "gpu/ipc/gpu_in_process_thread_service.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+#include "services/ui/surfaces/display_compositor_factory_delegate.h"
+
+namespace ui {
+
+DisplayCompositorFactory::DisplayCompositorFactory(
+    DisplayCompositorFactoryDelegate* delegate,
+    scoped_refptr<gpu::InProcessCommandBuffer::Service> gpu_command_service,
+    scoped_refptr<base::SingleThreadTaskRunner> compositor_runner,
+    gpu::ImageFactory* image_factory,
+    cc::mojom::DisplayCompositorFactoryRequest request)
+    : delegate_(delegate),
+      compositor_runner_(std::move(compositor_runner)),
+      image_factory_(image_factory),
+      gpu_command_service_(std::move(gpu_command_service)),
+      binding_(this, std::move(request)) {
+  DCHECK(compositor_runner_->BelongsToCurrentThread());
+}
+
+DisplayCompositorFactory::~DisplayCompositorFactory() {
+  DCHECK(compositor_runner_->BelongsToCurrentThread());
+}
+
+void DisplayCompositorFactory::CreateDisplayCompositor(
+    cc::mojom::DisplayCompositorRequest display_compositor_request,
+    cc::mojom::DisplayCompositorClientPtr display_compositor_client) {
+  DCHECK(compositor_runner_->BelongsToCurrentThread());
+  CHECK_EQ(nullptr, display_compositor_.get());
+
+  display_compositor_ = base::MakeUnique<DisplayCompositor>(
+      gpu_command_service_, delegate_->CreateGpuMemoryBufferManager(),
+      image_factory_, std::move(display_compositor_request),
+      std::move(display_compositor_client));
+}
+
+}  // namespace ui