mus: Get the gpu memory buffer from the window server.

services/ui/public/cpp/mojo_gpu_memory_buffer_manager.h

 // Copyright 2015 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_PUBLIC_CPP_MOJO_GPU_MEMORY_BUFFER_MANAGER_H_
 #define SERVICES_UI_PUBLIC_CPP_MOJO_GPU_MEMORY_BUFFER_MANAGER_H_
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
+#include "base/threading/thread.h"
 #include "gpu/command_buffer/client/gpu_memory_buffer_manager.h"
+#include "services/ui/public/interfaces/gpu_service.mojom.h"
+
+namespace base {
+class WaitableEvent;
+}
+
+namespace service_manager {
+class Connector;
+}
 
 namespace ui {
 
+namespace mojom {
+class GpuService;
+}
+
 class MojoGpuMemoryBufferManager : public gpu::GpuMemoryBufferManager {
  public:
-  MojoGpuMemoryBufferManager();
+  explicit MojoGpuMemoryBufferManager(service_manager::Connector* connector);
   ~MojoGpuMemoryBufferManager() override;
 
  private:
+  void InitThread();
+  void TearDownThread();
+  void AllocateGpuMemoryBufferOnThread(const gfx::Size& size,
+                                       gfx::BufferFormat format,
+                                       gfx::BufferUsage usage,
+                                       gfx::GpuMemoryBufferHandle* handle,
+                                       base::WaitableEvent* wait);
   void DeletedGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
                               const gpu::SyncToken& sync_token);
 
   // Overridden from gpu::GpuMemoryBufferManager:
   std::unique_ptr<gfx::GpuMemoryBuffer> AllocateGpuMemoryBuffer(
       const gfx::Size& size,
       gfx::BufferFormat format,
       gfx::BufferUsage usage,
       gpu::SurfaceHandle surface_handle) override;
   std::unique_ptr<gfx::GpuMemoryBuffer> CreateGpuMemoryBufferFromHandle(
       const gfx::GpuMemoryBufferHandle& handle,
       const gfx::Size& size,
       gfx::BufferFormat format) override;
   gfx::GpuMemoryBuffer* GpuMemoryBufferFromClientBuffer(
       ClientBuffer buffer) override;
   void SetDestructionSyncToken(gfx::GpuMemoryBuffer* buffer,
                                const gpu::SyncToken& sync_token) override;
-
   int counter_ = 0;
+  // TODO(sad): Explore the option of doing this from an existing thread.
+  base::Thread thread_;
+  mojom::GpuServicePtr gpu_service_;
+  std::unique_ptr<service_manager::Connector> connector_;
   base::WeakPtrFactory<MojoGpuMemoryBufferManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MojoGpuMemoryBufferManager);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_PUBLIC_CPP_MOJO_GPU_MEMORY_BUFFER_MANAGER_H_