Added initial Vulkan build files as well as a basic implementation file.

gpu/vulkan/vulkan_implementation.h

Index: gpu/vulkan/vulkan_implementation.h
diff --git a/gpu/vulkan/vulkan_implementation.h b/gpu/vulkan/vulkan_implementation.h
new file mode 100644
index 0000000000000000000000000000000000000000..ddbed2ce22f24a68e683425b2e68d51b08b14338
--- /dev/null
+++ b/gpu/vulkan/vulkan_implementation.h
@@ -0,0 +1,20 @@
+// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef GPU_VULKAN_VULKAN_IMPLEMENTATION_H_
+#define GPU_VULKAN_VULKAN_IMPLEMENTATION_H_
+
+#include <vulkan/vulkan.h>
+
+namespace gfx {
+
+bool InitializeVulkan();
+
+VkInstance GetVulkanInstance();
+VkDevice GetVulkanDevice();
+VkQueue GetVulkanQueue();
+
+}  // namespace gfx
+
+#endif  // GPU_VULKAN_VULKAN_WSI_API_IMPLEMENTATION_H_