Add vulkan files into skia repo.

src/gpu/vk/GrVkImageView.h

+/*
+* Copyright 2016 Google Inc.
+*
+* Use of this source code is governed by a BSD-style license that can be
+* found in the LICENSE file.
+*/
+
+#ifndef GrVkImageView_DEFINED
+#define GrVkImageView_DEFINED
+
+#include "GrTypes.h"
+
+#include "GrVkResource.h"
+
+#include "vulkan/vulkan.h"
+
+class GrVkImageView : public GrVkResource {
+public:
+    enum Type {
+        kColor_Type,
+        kStencil_Type
+    };
+    
+    static const GrVkImageView* Create(GrVkGpu* gpu, VkImage image, VkFormat format, Type viewType);
+
+    VkImageView imageView() const { return fImageView; }
+
+private:
+    GrVkImageView(VkImageView imageView) : INHERITED(), fImageView(imageView) {}
+
+    GrVkImageView(const GrVkImageView&);
+    GrVkImageView& operator=(const GrVkImageView&);
+
+    void freeGPUData(const GrVkGpu* gpu) const override;
+
+    VkImageView  fImageView;
+
+    typedef GrVkResource INHERITED;
+};
+
+#endif