Introduce Display Compositor mojo interface. Use InProcessContextProvider.

services/ui/gpu/gpu_service_internal.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_GPU_GPU_SERVICE_INTERNAL_H_
 #define SERVICES_UI_GPU_GPU_SERVICE_INTERNAL_H_
 
 #include "base/callback.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/non_thread_safe.h"
+#include "base/threading/thread.h"
 #include "build/build_config.h"
 #include "gpu/command_buffer/service/gpu_preferences.h"
 #include "gpu/config/gpu_info.h"
 #include "gpu/ipc/common/surface_handle.h"
 #include "gpu/ipc/service/gpu_channel.h"
 #include "gpu/ipc/service/gpu_channel_manager.h"
 #include "gpu/ipc/service/gpu_channel_manager_delegate.h"
 #include "gpu/ipc/service/gpu_config.h"
 #include "gpu/ipc/service/x_util.h"
 #include "mojo/public/cpp/bindings/binding.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
 #include "services/ui/gpu/interfaces/gpu_service_internal.mojom.h"
+#include "services/ui/surfaces/display_compositor.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace gpu {
 class GpuChannelHost;
 class GpuMemoryBufferFactory;
 class GpuWatchdogThread;
 class SyncPointManager;
 }
 
 namespace media {
@@ skipping 58 matching lines @@
       gfx::GpuMemoryBufferId id,
       const gfx::Size& size,
       gfx::BufferFormat format,
       gfx::BufferUsage usage,
       int client_id,
       gpu::SurfaceHandle surface_handle,
       const CreateGpuMemoryBufferCallback& callback) override;
   void DestroyGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
                               int client_id,
                               const gpu::SyncToken& sync_token) override;
+  void CreateDisplayCompositor(
+      cc::mojom::DisplayCompositorRequest request,
+      cc::mojom::DisplayCompositorClientPtr client) override;
+
+  void CreateDisplayCompositorOnCompositorThread(

[rjkroege, 2016/11/21 23:05:36]

how are the threads going to be identified in the musgpu?
In particular, ozone will need to do PostTask's to specific threads (gpu,
compositor) so having the compositor_thread_ embedded here as a private will be
inconvenient. 

I'd like more text about how the threads are built and connected.

[Fady Samuel, 2016/11/22 01:02:23]

Done.

+      mojom::GpuServiceInternalPtrInfo gpu_service_info,
+      cc::mojom::DisplayCompositorRequest request,
+      cc::mojom::DisplayCompositorClientPtrInfo client_info);
 
   scoped_refptr<base::SingleThreadTaskRunner> io_runner_;
 
   // An event that will be signalled when we shutdown.
   base::WaitableEvent shutdown_event_;
 
   std::unique_ptr<gpu::GpuWatchdogThread> watchdog_thread_;
 
   gpu::GpuMemoryBufferFactory* gpu_memory_buffer_factory_;
 
   gpu::GpuPreferences gpu_preferences_;
 
   // Information about the GPU, such as device and vendor ID.
   gpu::GPUInfo gpu_info_;
 
+  base::Thread compositor_thread_;
+
+  scoped_refptr<gpu::InProcessCommandBuffer::Service> gpu_command_service_;
   std::unique_ptr<gpu::SyncPointManager> owned_sync_point_manager_;
   std::unique_ptr<gpu::GpuChannelManager> gpu_channel_manager_;
   std::unique_ptr<media::MediaGpuChannelManager> media_gpu_channel_manager_;
-  mojo::Binding<mojom::GpuServiceInternal> binding_;
+  mojo::BindingSet<mojom::GpuServiceInternal> bindings_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuServiceInternal);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_GPU_GPU_SERVICE_INTERNAL_H_