Flatten vulkan-deps.

Sub-repos will be now checked out in third_party directly,
instead of under third_party/vulkan-deps.

Bug: chromium:341002187
Change-Id: I66e9731a478f7416d2e27879b616576209a631f7
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/189420
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
diff --git a/build_overrides/tint.gni b/build_overrides/tint.gni
index 7e14e84..4ebab93 100644
--- a/build_overrides/tint.gni
+++ b/build_overrides/tint.gni
@@ -29,6 +29,6 @@
 tint_standalone = true
 tint_has_build = true
 
-tint_spirv_tools_dir = "//third_party/vulkan-deps/spirv-tools/src"
-tint_spirv_headers_dir = "//third_party/vulkan-deps/spirv-headers/src"
-tint_glslang_dir = "//third_party/vulkan-deps/glslang/src"
+tint_spirv_tools_dir = "//third_party/spirv-tools/src"
+tint_spirv_headers_dir = "//third_party/spirv-headers/src"
+tint_glslang_dir = "//third_party/glslang/src"