mus/gpu: Introduce the GpuServiceHost mojom interface.

services/ui/gpu/interfaces/gpu_main.mojom

Index: services/ui/gpu/interfaces/gpu_main.mojom
diff --git a/services/ui/gpu/interfaces/gpu_main.mojom b/services/ui/gpu/interfaces/gpu_main.mojom
index f0b5284d62ddc71d189138e80f69b11a4a76f851..c9b4cd86d28760940c17c5cab2a7b10c636e3794 100644
--- a/services/ui/gpu/interfaces/gpu_main.mojom
+++ b/services/ui/gpu/interfaces/gpu_main.mojom
@@ -5,7 +5,7 @@
 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
@@ -15,6 +15,6 @@ interface GpuMain {
     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);
 };