Revert of Add vulkan files into skia repo.

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;
-    void onRelease() override;
-
-private:
-    GrVkTransferBuffer(GrVkGpu* gpu, const GrVkBuffer::Desc& desc,
-                       const GrVkBuffer::Resource* resource);
-    void setMemoryBacking(SkTraceMemoryDump* traceMemoryDump,
-                          const SkString& dumpName) const override;
-
-    void* onMap() override {
-        if (!this->wasDestroyed()) {
-            return this->vkMap(this->getVkGpu());
-        } else {
-            return nullptr;
-        }
-    }
-
-    void onUnmap() override {
-        if (!this->wasDestroyed()) {
-            this->vkUnmap(this->getVkGpu());
-        }
-    }
-
-    GrVkGpu* getVkGpu() const {
-        SkASSERT(!this->wasDestroyed());
-        return reinterpret_cast<GrVkGpu*>(this->getGpu());
-    }
-
-    typedef GrTransferBuffer INHERITED;
-};
-
-#endif