Cleanup VulkanWindowContext for use on Android

tools/viewer/sk_app/VulkanWindowContext.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 VulkanWindowContext_DEFINED
 #define VulkanWindowContext_DEFINED
 
+#include "SkTypes.h" // required to pull in any SkUserConfig defines
+
 #ifdef SK_VULKAN
 
 #include "vk/GrVkBackendContext.h"
 #include "WindowContext.h"
 
 class GrRenderTarget;
 
 namespace sk_app {
 
 class VulkanWindowContext : public WindowContext {
@@ skipping 88 matching lines @@
     VkCommandPool          fCommandPool;
     BackbufferInfo*        fBackbuffers;
     uint32_t               fCurrentBackbufferIndex;
 };
 
 }   // namespace sk_app
 
 #endif // SK_VULKAN
 
 #endif