Add WSI functions to GrVkInterface

src/gpu/vk/GrVkSampler.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 GrVkSampler_DEFINED
 #define GrVkSampler_DEFINED
 
 #include "GrVkResource.h"
 
-#include "vulkan/vulkan.h"
+#include "vk/GrVkDefines.h"
 
 class GrTextureAccess;
 class GrTextureParams;
 class GrVkGpu;
 
 
 class GrVkSampler : public GrVkResource {
 public:
     static GrVkSampler* Create(const GrVkGpu* gpu, const GrTextureParams&);
 
@@ skipping 10 matching lines @@
     void freeGPUData(const GrVkGpu* gpu) const override;
 
     VkSampler  fSampler;
     uint8_t   fKey;
 
     typedef GrVkResource INHERITED;
 };
 
 #endif