Dawn reuses the Vulkan validation layers of ANGLE to avoid building
twice in chromium, and references build_overrides/vulkan_common.gni,
but angle_data_dir is undefined, which is defined as data_dir in
angle.gni. There is a reminder to rename this name in
https://chromium-review.googlesource.com/c/chromium/src/+/1610488

Bug: angleproject:3710
Change-Id: I4b7c4d24c37770ff58b70c988851a6ed32a04296
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1703175Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>