The only use of shlwapi is for a single method which can be easily
replaced by simple wstring calls. This change makes that swap and
removes the reference to shlwapi completely.

Bug: v8:9031
Change-Id: Ia8f2c44e8166d93e309016896b26a84bdb90d720
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1534960Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Cliff Smolinsky <cliffsmo@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#60451}