Add WSI functions to GrVkInterface

src/gpu/vk/GrVkTransferBuffer.h

 /*
 * Copyright 2015 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #ifndef GrVkTransferBuffer_DEFINED
 #define GrVkTransferBuffer_DEFINED
 
 #include "GrTransferBuffer.h"
 #include "GrVkBuffer.h"
-#include "vk/GrVkInterface.h"
 
 class GrVkGpu;
 
 class GrVkTransferBuffer : public GrTransferBuffer, public GrVkBuffer {
 
 public:
     static GrVkTransferBuffer* Create(GrVkGpu* gpu, size_t size, GrVkBuffer::Type type);
 
 protected:
     void onAbandon() override;
@@ skipping 21 matching lines @@
 
     GrVkGpu* getVkGpu() const {
         SkASSERT(!this->wasDestroyed());
         return reinterpret_cast<GrVkGpu*>(this->getGpu());
     }
 
     typedef GrTransferBuffer INHERITED;
 };
 
 #endif