exo: Directly create GpuMemoryBufferImpl when a handle is available.

services/ui/common/server_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 SERVICES_UI_COMMON_SERVER_GPU_MEMORY_BUFFER_MANAGER_H_
 #define SERVICES_UI_COMMON_SERVER_GPU_MEMORY_BUFFER_MANAGER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 26 matching lines @@
       gfx::BufferFormat format,
       gfx::BufferUsage usage,
       gpu::SurfaceHandle surface_handle);
 
   // Overridden from gpu::GpuMemoryBufferManager:
   std::unique_ptr<gfx::GpuMemoryBuffer> CreateGpuMemoryBuffer(
       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;
   void SetDestructionSyncToken(gfx::GpuMemoryBuffer* buffer,
                                const gpu::SyncToken& sync_token) override;
 
  private:
   mojom::GpuService* gpu_service_;
   const int client_id_;
   int next_gpu_memory_id_ = 1;
 
   using NativeBuffers =
       std::unordered_set<gfx::GpuMemoryBufferId,
                          BASE_HASH_NAMESPACE::hash<gfx::GpuMemoryBufferId>>;
   std::unordered_map<int, NativeBuffers> native_buffers_;
 
   const gpu::GpuMemoryBufferConfigurationSet native_configurations_;
   base::WeakPtrFactory<ServerGpuMemoryBufferManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServerGpuMemoryBufferManager);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_COMMON_SERVER_GPU_MEMORY_BUFFER_MANAGER_H_