gpu: Introduce GpuInit.

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 c2021ff1bf3db0e4acafa969514e715746e1e7be..e5921d1709eb82b9424a9b61e0835400a8b6fb85 100644
--- a/services/ui/ws/gpu_service_proxy.h
+++ b/services/ui/ws/gpu_service_proxy.h
@@ -12,6 +12,7 @@
 #include "gpu/ipc/client/gpu_channel_host.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
+#include "services/ui/gpu/gpu_main.h"
 #include "services/ui/gpu/interfaces/gpu_service_internal.mojom.h"
 #include "services/ui/public/interfaces/gpu_memory_buffer.mojom.h"
 #include "services/ui/public/interfaces/gpu_service.mojom.h"
@@ -77,6 +78,7 @@ class GpuServiceProxy : public mojom::GpuService,
   base::WaitableEvent shutdown_event_;
   std::unique_ptr<base::Thread> io_thread_;
   std::unique_ptr<MusGpuMemoryBufferManager> gpu_memory_buffer_manager_;
+  GpuMain gpu_main_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuServiceProxy);
 };