Introduce GN variables for Vulkan repos.

BUILD.gn

@@ -402,7 +402,7 @@ angle_static_library("angle_gpu_info_util") {
 
   if (!is_chromeos && angle_has_build) {
     sources += libangle_gpu_info_util_vulkan_sources
-    deps += [ "$angle_root/third_party/vulkan-headers/src:vulkan_headers" ]
+    deps += [ "$angle_vulkan_headers_dir:vulkan_headers" ]
   }
 
   if (is_android) {

build_overrides/vulkan_loader.gni

@@ -4,7 +4,7 @@
 
 import("//gni/angle.gni")
 
-vulkan_headers_dir = "//third_party/vulkan-headers/src"
+vulkan_headers_dir = angle_vulkan_headers_dir
 
 vulkan_gen_subdir = "angle/vulkan"
 vulkan_loader_shared = angle_shared_libvulkan

build_overrides/vulkan_tools.gni

@@ -4,7 +4,7 @@
 
 import("//gni/angle.gni")
 
-vulkan_headers_dir = "//third_party/vulkan-headers/src"
+vulkan_headers_dir = angle_vulkan_headers_dir
 
 vulkan_data_subdir = angle_data_dir
 vulkan_gen_subdir = "angle/vulkan"

build_overrides/vulkan_validation_layers.gni

@@ -4,7 +4,7 @@
 
 import("//gni/angle.gni")
 
-vulkan_headers_dir = "//third_party/vulkan-headers/src"
+vulkan_headers_dir = angle_vulkan_headers_dir
 vvl_spirv_tools_dir = "//third_party/spirv-tools/src"
 vvl_glslang_dir = "//third_party/glslang/src"
 

gni/angle.gni

@@ -151,6 +151,12 @@ declare_args() {
   angle_enable_eagl = angle_enable_gl && is_ios &&
                       !(target_environment == "catalyst" &&
                         (target_cpu == "x86" || target_cpu == "x64"))
+
+  angle_vulkan_headers_dir = "$angle_root/third_party/vulkan-headers/src"
+  angle_vulkan_loader_dir = "$angle_root/third_party/vulkan-loader/src"
+  angle_vulkan_tools_dir = "$angle_root/third_party/vulkan-tools/src"
+  angle_vulkan_validation_layers_dir =
+      "$angle_root/third_party/vulkan-validation-layers/src"
 }
 
 declare_args() {

src/common/vulkan/BUILD.gn

@@ -28,8 +28,7 @@ angle_source_set("angle_vulkan_headers") {
   if (angle_shared_libvulkan) {
     public_deps = [ "$angle_root/src/third_party/volk:volk" ]
   } else {
-    public_deps =
-        [ "$angle_root/third_party/vulkan-headers/src:vulkan_headers" ]
+    public_deps = [ "$angle_vulkan_headers_dir:vulkan_headers" ]
   }
   public_configs = [ ":angle_vulkan_headers_config" ]
 }
@@ -45,9 +44,9 @@ group("angle_vulkan_entry_points") {
     ]
   } else if (!is_android && !is_ggp) {
     if (angle_shared_libvulkan) {
-      data_deps = [ "$angle_root/third_party/vulkan-loader/src:libvulkan" ]
+      data_deps = [ "$angle_vulkan_loader_dir:libvulkan" ]
     } else {
-      deps = [ "$angle_root/third_party/vulkan-loader/src:libvulkan" ]
+      deps = [ "$angle_vulkan_loader_dir:libvulkan" ]
     }
   }
 }
@@ -75,11 +74,11 @@ angle_source_set("vulkan") {
 
   if (!is_android && !is_fuchsia && !is_ggp) {
     if (angle_shared_libvulkan) {
-      data_deps += [ "$angle_root/third_party/vulkan-loader/src:libvulkan" ]
+      data_deps += [ "$angle_vulkan_loader_dir:libvulkan" ]
     } else {
-      deps += [ "$angle_root/third_party/vulkan-loader/src:libvulkan" ]
+      deps += [ "$angle_vulkan_loader_dir:libvulkan" ]
     }
-    data_deps += [ "$angle_root/third_party/vulkan-tools/src:VkICD_mock_icd" ]
+    data_deps += [ "$angle_vulkan_tools_dir:VkICD_mock_icd" ]
   }
 
   if (angle_enable_swiftshader) {
@@ -104,9 +103,11 @@ if (angle_enable_vulkan_validation_layers) {
     if (is_fuchsia) {
       data_deps += [ "//third_party/fuchsia-sdk:vulkan_validation" ]
     } else {
-      data_deps += [ "$angle_root/third_party/vulkan-validation-layers/src:vulkan_validation_layers" ]
+      data_deps +=
+          [ "$angle_vulkan_validation_layers_dir:vulkan_validation_layers" ]
       if (!is_android) {
-        data_deps += [ "$angle_root/third_party/vulkan-validation-layers/src:vulkan_gen_json_files" ]
+        data_deps +=
+            [ "$angle_vulkan_validation_layers_dir:vulkan_gen_json_files" ]
       }
     }
   }

src/third_party/volk/BUILD.gn

@@ -15,5 +15,5 @@ source_set("volk") {
   ]
   public_configs = [ ":volk_config" ]
   configs += [ "$angle_root:angle_no_cfi_icall" ]
-  public_deps = [ "../../../third_party/vulkan-headers/src:vulkan_headers" ]
+  public_deps = [ "$angle_vulkan_headers_dir:vulkan_headers" ]
 }