services/ui: Split GpuServiceInternal into gpu vs. ws pieces.

services/ui/ws/gpu_service_proxy_delegate.h

+// 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.
+
+#ifndef SERVICES_UI_WS_GPU_SERVICE_PROXY_DELEGATEH_
+#define SERVICES_UI_WS_GPU_SERVICE_PROXY_DELEGATEH_
+
+#include "base/memory/ref_counted.h"
+
+namespace gpu {
+class GpuChannelHost;
+}
+
+namespace ui {
+namespace ws {
+
+class GpuServiceProxyDelegate {
+ public:
+  virtual ~GpuServiceProxyDelegate() {}
+
+  virtual void OnGpuChannelEstablished(
+      scoped_refptr<gpu::GpuChannelHost> gpu_channel) = 0;
+};
+
+}  // namespace ws
+}  // namespace ui
+
+#endif  // SERVICES_UI_WS_GPU_SERVICE_PROXY_DELEGATEH_