Introduce Display Compositor mojo interface. Use InProcessContextProvider.

services/ui/ws/server_window_compositor_frame_sink_manager.h

Index: services/ui/ws/server_window_compositor_frame_sink_manager.h
diff --git a/services/ui/ws/server_window_compositor_frame_sink_manager.h b/services/ui/ws/server_window_compositor_frame_sink_manager.h
index 746767d18e8bf6d30970dd8a5c4fab105d08f5ce..d2db13e068e228009f5dd5decfe81554aa421c7f 100644
--- a/services/ui/ws/server_window_compositor_frame_sink_manager.h
+++ b/services/ui/ws/server_window_compositor_frame_sink_manager.h
@@ -13,7 +13,6 @@
 #include "cc/surfaces/surface_id.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "services/ui/public/interfaces/window_tree.mojom.h"
-#include "services/ui/surfaces/surfaces_context_provider.h"
 
 namespace gpu {
 class GpuMemoryBufferManager;
@@ -22,7 +21,6 @@ class GpuMemoryBufferManager;
 namespace ui {
 namespace ws {
 
-class GpuCompositorFrameSink;
 class ServerWindow;
 class ServerWindowCompositorFrameSink;
 class ServerWindowCompositorFrameSinkManagerTestApi;
@@ -39,7 +37,6 @@ struct CompositorFrameSinkData {
   cc::mojom::MojoCompositorFrameSinkPrivatePtr compositor_frame_sink;
   cc::mojom::MojoCompositorFrameSinkPrivateRequest
       pending_compositor_frame_sink_request;
-  std::unique_ptr<GpuCompositorFrameSink> compositor_frame_sink_impl_;
 };
 
 // ServerWindowCompositorFrameSinkManager tracks the surfaces associated with a
@@ -59,8 +56,6 @@ class ServerWindowCompositorFrameSinkManager {
   void CreateCompositorFrameSink(
       mojom::CompositorFrameSinkType compositor_frame_sink_type,
       gfx::AcceleratedWidget widget,
-      gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
-      scoped_refptr<SurfacesContextProvider> context_provider,
       cc::mojom::MojoCompositorFrameSinkRequest request,
       cc::mojom::MojoCompositorFrameSinkClientPtr client);