String16WildcardMatchInsensitive has its own implementation of pattern matching which looks similar to base::MatchPattern. The big difference is it allows any escape char (should be easy to add to MatchPattern).

However String16WildcardMatchInsensitive includes a cache for performance reasons - we'll need to check if MatchPattern matches the performance without the cache, or else keep the cache layer. Also need to check if we depend on any implementation quirks of String16WildcardMatchInsensitive.