mus/gpu: Introduce the GpuServiceHost mojom interface.

services/ui/gpu/interfaces/gpu_main.mojom

 // 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.
 
 module ui.mojom;
 
 import "cc/ipc/display_compositor.mojom";
-import "gpu/ipc/common/gpu_info.mojom";
+import "services/ui/gpu/interfaces/gpu_service_host.mojom";
 import "services/ui/gpu/interfaces/gpu_service_internal.mojom";
 
 // This is the primordial interface used to (re)start the mus-gpu bundle
 // of services.
 interface GpuMain {
   CreateDisplayCompositor(
     cc.mojom.DisplayCompositor& display_compositor,
     cc.mojom.DisplayCompositorClient display_compositor_client);
 
-  CreateGpuService(GpuServiceInternal& gpu_service) =>
-      (gpu.mojom.GpuInfo gpu_info);
+  CreateGpuService(GpuServiceInternal& gpu_service,
+                   GpuServiceHost gpu_host);
 };