Add vulkan files into skia repo.

src/gpu/vk/GrVkMemory.h

+/*
+* Copyright 2015 Google Inc.
+*
+* Use of this source code is governed by a BSD-style license that can be
+* found in the LICENSE file.
+*/
+
+#ifndef GrVkMemory_DEFINED
+#define GrVkMemory_DEFINED
+
+#include "vulkan/vulkan.h"
+
+class GrVkGpu;
+
+namespace GrVkMemory {
+    /**
+    * Allocates vulkan device memory and binds it to the gpu's device for the given object.
+    * Returns true of allocation succeeded.
+    */
+    bool AllocAndBindBufferMemory(const GrVkGpu* gpu,
+                                  VkBuffer buffer,
+                                  const VkMemoryPropertyFlags flags,
+                                  VkDeviceMemory* memory);
+
+    bool AllocAndBindImageMemory(const GrVkGpu* gpu,
+                                 VkImage image,
+                                 const VkMemoryPropertyFlags flags,
+                                 VkDeviceMemory* memory);
+
+    VkPipelineStageFlags LayoutToPipelineStageFlags(const VkImageLayout layout);
+
+    VkAccessFlags LayoutToSrcAccessMask(const VkImageLayout layout);
+}
+
+#endif