Add WSI functions to GrVkInterface

src/gpu/vk/GrVkExtensions.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 GrVkExtensions_DEFINED
 #define GrVkExtensions_DEFINED
 
-#include "../../private/SkTArray.h"
+#include "../private/SkTArray.h"
 #include "SkString.h"
-#include "vulkan/vulkan.h"
+#include "vk/GrVkDefines.h"
 
 /**
  * This helper queries the Vulkan driver for available extensions and layers, remembers them, 
  * and can be queried. It supports queries for both instance and device extensions and layers.
  */
 class SK_API GrVkExtensions {
 public:
     GrVkExtensions() : fInstanceExtensionStrings(new SkTArray<SkString>)
                      , fDeviceExtensionStrings(new SkTArray<SkString>)
                      , fInstanceLayerStrings(new SkTArray<SkString>)
@@ skipping 13 matching lines @@
     void print(const char* sep = "\n") const;
 
 private:
     SkAutoTDelete<SkTArray<SkString> >  fInstanceExtensionStrings;
     SkAutoTDelete<SkTArray<SkString> >  fDeviceExtensionStrings;
     SkAutoTDelete<SkTArray<SkString> >  fInstanceLayerStrings;
     SkAutoTDelete<SkTArray<SkString> >  fDeviceLayerStrings;
 };
 
 #endif