Disable compile_xcassets on macOS.

xcassets are only used on iOS, not macOS. We want to minimize the number of
Xcode-based tools used by the macOS toolchain, so we intentionally disallow
future uses of xcassets on macOS.

Change-Id: Id559f84633be6c935211561b976a7991810d94ad
Bug: 965663
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1643406
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#666695}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 6c478646f25b58fe24c885b76f3f3e5c0a0fcd51
1 file changed