gfx: Struct traits for GpuMemoryBufferId and GpuMemoryBufferType.

services/ui/ws/gpu_service_proxy.h

Index: services/ui/ws/gpu_service_proxy.h
diff --git a/services/ui/ws/gpu_service_proxy.h b/services/ui/ws/gpu_service_proxy.h
index 9a9a009873a01fde91e5e1895d04b2dc5abd4b50..91b027b95863014584e49cfecf7f2a1dff1c114f 100644
--- a/services/ui/ws/gpu_service_proxy.h
+++ b/services/ui/ws/gpu_service_proxy.h
@@ -51,14 +51,14 @@ class GpuServiceProxy : public mojom::GpuService,
   void EstablishGpuChannel(
       const EstablishGpuChannelCallback& callback) override;
   void CreateGpuMemoryBuffer(
-      mojom::GpuMemoryBufferIdPtr id,
+      const gfx::GpuMemoryBufferId& 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,
+  void DestroyGpuMemoryBuffer(const gfx::GpuMemoryBufferId& id,
                               const gpu::SyncToken& sync_token) override;
 
   // gpu::GpuChannelHostFactory overrides: