gfx: Struct traits for GpuMemoryBufferId and GpuMemoryBufferType.

services/ui/ws/gpu_service_proxy.cc

Index: services/ui/ws/gpu_service_proxy.cc
diff --git a/services/ui/ws/gpu_service_proxy.cc b/services/ui/ws/gpu_service_proxy.cc
index 7decbc3bb24d398236685c78a9fe6510ea6e72d1..760bdef102972ef772931aeda99d724e9646ed6b 100644
--- a/services/ui/ws/gpu_service_proxy.cc
+++ b/services/ui/ws/gpu_service_proxy.cc
@@ -93,7 +93,7 @@ void GpuServiceProxy::EstablishGpuChannel(
 }
 
 void GpuServiceProxy::CreateGpuMemoryBuffer(
-    mojom::GpuMemoryBufferIdPtr id,
+    const gfx::GpuMemoryBufferId& id,
     const gfx::Size& size,
     gfx::BufferFormat format,
     gfx::BufferUsage usage,
@@ -102,7 +102,7 @@ void GpuServiceProxy::CreateGpuMemoryBuffer(
   NOTIMPLEMENTED();
 }
 
-void GpuServiceProxy::DestroyGpuMemoryBuffer(mojom::GpuMemoryBufferIdPtr id,
+void GpuServiceProxy::DestroyGpuMemoryBuffer(const gfx::GpuMemoryBufferId& id,
                                              const gpu::SyncToken& sync_token) {
   NOTIMPLEMENTED();
 }