Implement MusGpuMemoryBufferManager

components/mus/gpu/mus_gpu_memory_buffer_manager.h

 // 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.
 
-#ifndef BLIMP_CLIENT_FEATURE_COMPOSITOR_BLIMP_GPU_MEMORY_BUFFER_MANAGER_H_
-#define BLIMP_CLIENT_FEATURE_COMPOSITOR_BLIMP_GPU_MEMORY_BUFFER_MANAGER_H_
+#ifndef COMPONENTS_MUS_GPU_MUS_GPU_MEMORY_BUFFER_MANAGER_H_
+#define COMPONENTS_MUS_GPU_MUS_GPU_MEMORY_BUFFER_MANAGER_H_
 
 #include <memory>
 
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "gpu/command_buffer/client/gpu_memory_buffer_manager.h"
 
-namespace blimp {
-namespace client {
+namespace mus {
 
-class BlimpGpuMemoryBufferManager : public gpu::GpuMemoryBufferManager {
+// This GpuMemoryBufferManager is for establishing a GpuChannelHost used by
+// mus locally.
+class MusGpuMemoryBufferManager : public gpu::GpuMemoryBufferManager {
  public:
-  BlimpGpuMemoryBufferManager();
-  ~BlimpGpuMemoryBufferManager() override;
+  explicit MusGpuMemoryBufferManager(int client_id);
+  ~MusGpuMemoryBufferManager() override;
+
+  static MusGpuMemoryBufferManager* current();
 
   // 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;
   std::unique_ptr<gfx::GpuMemoryBuffer> CreateGpuMemoryBufferFromClientId(
       int client_id,
       const gfx::GpuMemoryBufferId& gpu_memory_buffer_id) override;
   gfx::GpuMemoryBuffer* GpuMemoryBufferFromClientBuffer(
       ClientBuffer buffer) override;
   void SetDestructionSyncToken(gfx::GpuMemoryBuffer* buffer,
                                const gpu::SyncToken& sync_token) override;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(BlimpGpuMemoryBufferManager);
+  DISALLOW_COPY_AND_ASSIGN(MusGpuMemoryBufferManager);
+
+  void DestroyGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
+                              int client_id,
+                              bool is_native,
+                              const gpu::SyncToken& sync_token);
+
+  const int client_id_;
+  base::WeakPtrFactory<MusGpuMemoryBufferManager> weak_factory_;
 };
 
-}  // namespace client
-}  // namespace blimp
+}  // namespace mus
 
-#endif  // BLIMP_CLIENT_FEATURE_COMPOSITOR_BLIMP_GPU_MEMORY_BUFFER_MANAGER_H_
+#endif  // COMPONENTS_MUS_GPU_MUS_GPU_MEMORY_BUFFER_MANAGER_H_