Introduce DisplayProvider for DisplayCompositor.

services/ui/surfaces/mus_display_provider.h

+// Copyright 2017 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.
+
+#ifndef SERVICES_UI_SURFACES_MUS_DISPLAY_PROVIDER_H_
+#define SERVICES_UI_SURFACES_MUS_DISPLAY_PROVIDER_H_
+
+#include <memory>
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "cc/surfaces/frame_sink_id.h"
+#include "gpu/command_buffer/client/gpu_memory_buffer_manager.h"
+#include "gpu/ipc/common/surface_handle.h"
+#include "gpu/ipc/in_process_command_buffer.h"
+#include "services/ui/surfaces/display_provider.h"
+
+namespace gpu {
+class ImageFactory;
+}
+
+namespace ui {
+
+// Mus implementation of DisplayProvider. This will be created in mus-gpu.
+class MusDisplayProvider : public NON_EXPORTED_BASE(DisplayProvider) {
+ public:
+  MusDisplayProvider(
+      scoped_refptr<gpu::InProcessCommandBuffer::Service> gpu_service,
+      std::unique_ptr<gpu::GpuMemoryBufferManager> gpu_memory_buffer_manager,
+      gpu::ImageFactory* image_factory);
+  ~MusDisplayProvider() override;
+
+  // display_compositor::DisplayProvider:
+  std::unique_ptr<cc::Display> CreateDisplay(
+      const cc::FrameSinkId& frame_sink_id,
+      gpu::SurfaceHandle surface_handle,
+      std::unique_ptr<cc::BeginFrameSource>* begin_frame_source) override;
+
+ private:
+  scoped_refptr<gpu::InProcessCommandBuffer::Service> gpu_service_;
+  std::unique_ptr<gpu::GpuMemoryBufferManager> gpu_memory_buffer_manager_;
+  gpu::ImageFactory* image_factory_;
+
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(MusDisplayProvider);
+};
+
+}  // namespace ui
+
+#endif  //  SERVICES_UI_SURFACES_MUS_DISPLAY_PROVIDER_H_