Add WSI functions to GrVkInterface

src/gpu/vk/GrVkResourceProvider.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 GrVkResourceProvider_DEFINED
 #define GrVkResourceProvider_DEFINED
 
 #include "GrGpu.h"
 #include "GrVkDescriptorPool.h"
 #include "GrVkPipelineState.h"
 #include "GrVkResource.h"
 #include "GrVkUtil.h"
 #include "SkTArray.h"
 #include "SkTDynamicHash.h"
 
-#include "vulkan/vulkan.h"
+#include "vk/GrVkDefines.h"
 
 class GrPipeline;
 class GrPrimitiveProcessor;
 class GrTextureParams;
 class GrVkCommandBuffer;
 class GrVkGpu;
 class GrVkPipeline;
 class GrVkRenderPass;
 class GrVkRenderTarget;
 class GrVkSampler;
@@ skipping 110 matching lines @@
 
     // Stores GrVkSampler objects that we've already created so we can reuse them across multiple
     // GrVkPipelineStates
     SkTDynamicHash<GrVkSampler, uint8_t> fSamplers;
 
     // Cache of GrVkPipelineStates
     PipelineStateCache* fPipelineStateCache;
 };
 
 #endif