services/ui: Add mojom API for creating/destroying gpu memory buffer.

services/ui/gpu/gpu_service_internal.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/gpu/gpu_service_internal.h"
 
 #include "base/memory/shared_memory.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "gpu/command_buffer/service/gpu_switches.h"
@@ skipping 43 matching lines @@
   // For example, in the renderer the RenderThread instances will be able to
   // notice shutdown before the render process begins waiting for them to exit.
   shutdown_event_.Signal();
 }
 
 void GpuServiceInternal::Add(mojom::GpuServiceInternalRequest request) {
   binding_.Close();
   binding_.Bind(std::move(request));
 }
 
-gfx::GpuMemoryBufferHandle GpuServiceInternal::CreateGpuMemoryBuffer(
+void GpuServiceInternal::CreateGpuMemoryBuffer(
     gfx::GpuMemoryBufferId id,
     const gfx::Size& size,
     gfx::BufferFormat format,
     gfx::BufferUsage usage,
     int client_id,
-    gpu::SurfaceHandle surface_handle) {
+    gpu::SurfaceHandle surface_handle,
+    const CreateGpuMemoryBufferCallback& callback) {
   DCHECK(CalledOnValidThread());
-  return gpu_memory_buffer_factory_->CreateGpuMemoryBuffer(
-      id, size, format, usage, client_id, surface_handle);
+  callback.Run(gpu_memory_buffer_factory_->CreateGpuMemoryBuffer(
+      id, size, format, usage, client_id, surface_handle));
 }
 
 void GpuServiceInternal::DestroyGpuMemoryBuffer(
     gfx::GpuMemoryBufferId id,
     int client_id,
     const gpu::SyncToken& sync_token) {
   DCHECK(CalledOnValidThread());
   if (gpu_channel_manager_)
     gpu_channel_manager_->DestroyGpuMemoryBuffer(id, client_id, sync_token);
 }
@@ skipping 80 matching lines @@
   mojo::ScopedMessagePipeHandle channel_handle;
   IPC::ChannelHandle handle = gpu_channel_manager_->EstablishChannel(
       client_id, client_tracing_id, preempts, allow_view_command_buffers,
       allow_real_time_streams);
   channel_handle.reset(handle.mojo_handle);
   media_service_->AddChannel(client_id);
   callback.Run(std::move(channel_handle));
 }
 
 }  // namespace ui