services/ui: Split GpuServiceInternal into gpu vs. ws pieces.

services/ui/ws/gpu_service_proxy.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_WS_GPU_SERVICE_PROXY_H_
 #define SERVICES_UI_WS_GPU_SERVICE_PROXY_H_
 
+#include "base/single_thread_task_runner.h"
+#include "base/synchronization/waitable_event.h"
+#include "base/threading/thread.h"
 #include "gpu/config/gpu_info.h"
+#include "gpu/ipc/client/gpu_channel_host.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "services/ui/gpu/interfaces/gpu_service_internal.mojom.h"
 #include "services/ui/public/interfaces/gpu_memory_buffer.mojom.h"
 #include "services/ui/public/interfaces/gpu_service.mojom.h"
 
+namespace gpu {
+class GpuChannelHost;
+}
+
 namespace ui {
 
 class GpuServiceInternal;
 
+namespace ws {
+
+class MusGpuMemoryBufferManager;
+
 // The proxy implementation that relays requests from clients to the real
 // service implementation in the GPU process over mojom.GpuServiceInternal.
-class GpuServiceProxy : public mojom::GpuService {
+class GpuServiceProxy : public mojom::GpuService,

[Fady Samuel, 2016/08/26 16:27:59]

Huge optional bikeshed color: GpuServiceProxy=>GpuServiceHost or better yet:

GpuServiceInternal => Gpu

GpuService => GpuHost

GpuServiceProxy => GpuHost.

[sadrul, 2016/08/26 17:23:50]

GpuServiceInternal could be named Gpu. I don't have a strong preference either
way. I slightly prefer GpuServiceInternal because that makes it more obvious to
me that it's an internal mus API that isn't exposed to clients.

re GpuService: I think it'd be useful to have separate names for the
communication API for client->window-server, and the API for gpu->window-server.
The first one (client->window) is currently called mojom.GpuService, and the
latter will be called mojom.GpuHost. GpuServiceProxy will implement this
mojom.GpuHost interface, so we could call it GpuHost at that time.

I am going to keep the current names for now in this CL. We can do no-op renames
separately.

(pic:
https://docs.google.com/presentation/d/1ieNtQNpWmVMkMqA6FrHC1bUPg2mkZ_zGVDKPk...)

+                        public gpu::GpuChannelHostFactory {
  public:
-  GpuServiceProxy();
+  class Delegate {

[Fady Samuel, 2016/08/26 16:27:59]

Move this Delegate to a separate file?

[sky, 2016/08/26 16:46:30]

+1

[sadrul, 2016/08/26 17:23:50]

Done.

+   public:
+    virtual void OnGpuChannelEstablished(
+        scoped_refptr<gpu::GpuChannelHost> gpu_channel) = 0;
+  };
+
+  explicit GpuServiceProxy(Delegate* delegate);
   ~GpuServiceProxy() override;
 
   void Add(mojom::GpuServiceRequest request);
 
  private:
   void OnInitialized(const gpu::GPUInfo& gpu_info);
   void OnGpuChannelEstablished(const EstablishGpuChannelCallback& callback,
                                int32_t client_id,
                                mojo::ScopedMessagePipeHandle channel_handle);
+  void OnInternalGpuChannelEstablished(
+      mojo::ScopedMessagePipeHandle channel_handle);
 
   // mojom::GpuService overrides:
   void EstablishGpuChannel(
       const EstablishGpuChannelCallback& callback) override;
-
   void CreateGpuMemoryBuffer(
       mojom::GpuMemoryBufferIdPtr id,
       const gfx::Size& size,
       gfx::BufferFormat format,
       gfx::BufferUsage usage,
       uint64_t surface_id,
       const mojom::GpuService::CreateGpuMemoryBufferCallback& callback)
       override;
-
   void DestroyGpuMemoryBuffer(mojom::GpuMemoryBufferIdPtr id,
                               const gpu::SyncToken& sync_token) override;
 
+  // gpu::GpuChannelHostFactory overrides:
+  bool IsMainThread() override;
+  scoped_refptr<base::SingleThreadTaskRunner> GetIOThreadTaskRunner() override;
+  std::unique_ptr<base::SharedMemory> AllocateSharedMemory(
+      size_t size) override;
+
+  Delegate* delegate_;
   int32_t next_client_id_;
+  scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
   mojom::GpuServiceInternalPtr gpu_service_;
-  mojo::BindingSet<GpuService> bindings_;
+  mojo::BindingSet<mojom::GpuService> bindings_;
   gpu::GPUInfo gpu_info_;
+  scoped_refptr<gpu::GpuChannelHost> gpu_channel_;
+  base::WaitableEvent shutdown_event_;
+  std::unique_ptr<base::Thread> io_thread_;
+  std::unique_ptr<MusGpuMemoryBufferManager> gpu_memory_buffer_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuServiceProxy);
 };
 
+}  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_GPU_SERVICE_PROXY_H_