Mark error strings as inline constexpr Some WebKit build configurations are seeing duplicated strings. A global constexpr implies static, which allows that each compile unit gets its own instance. A global inline constexpr guarantees that the instance address evaluates same for all address takers. This should guarantee that the strings are not duplicated. Use char[] instead of char * to guarantee that referencers would get the length. Bug: angleproject:392938089 Change-Id: I5652ed8807d5052abe41671f4a0005905fe8d30b Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6218459 Commit-Queue: Geoff Lang <geofflang@chromium.org> Auto-Submit: Kimmo Kinnunen <kkinnunen@apple.com> Reviewed-by: Geoff Lang <geofflang@chromium.org>