Add Vulkan config for Skia in Chromium.

This CL adds customized Vulkan header for Skia.

Bug: 582554

Change-Id: Iaac8127d71de3b9ffbba54b9dd68053aea9c0777
Signed-off-by: suyambu.rm <suyambu.rm@samsung.com>
Reviewed-on: https://chromium-review.googlesource.com/816214
Commit-Queue: Chandan Padhi <c.padhi@samsung.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524662}

skia/BUILD.gn

@@ -45,7 +45,7 @@ config("skia_config") {
     "//third_party/skia/include/pipe",
     "//third_party/skia/include/ports",
     "//third_party/skia/include/utils",
-    "//third_party/skia/third_party/vulkan",
+    "//third_party/vulkan/include",
   ]
   if (enable_vulkan) {
     include_dirs += [ "$vulkan_sdk_path/include" ]
@@ -61,7 +61,10 @@ config("skia_config") {
     defines += [ "SK_HAS_JPEG_LIBRARY" ]
   }
   if (enable_vulkan) {
-    defines += [ "SK_VULKAN=1" ]
+    defines += [
+      "SK_VULKAN_HEADER=\"../../skia/config/SkVulkanConfig.h\"",
+      "SK_VULKAN=1",
+    ]
   }
 
   if (is_component_build) {

skia/config/SkVulkanConfig.h

+// Copyright 2017 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 GrVulkanDefines_DEFINED
+#define GrVulkanDefines_DEFINED
+
+#ifdef SK_VULKAN
+
+#if defined(USE_X11)
+// TODO(crbug.com/582554): As Skia backs on XCB for vulkan backend
+// temporarily define VK_USE_PLATFORM_XCB_KHR to avoid build break.
+// Change it to VK_USE_PLATFORM_XLIB_KHR if Skia supports xlib in future.
+#define VK_USE_PLATFORM_XCB_KHR
+#endif
+
+#if defined(OS_ANDROID)
+#define VK_USE_PLATFORM_ANDROID_KHR
+#endif
+
+#include <vulkan/vulkan.h>
+
+#endif
+
+#endif