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With the Webapp gone, I am updating some build rules to be less webapp
specific.

Change-Id: I420aa95f9a87095008b5c39ef552db786b2301f4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1947985Reviewed-by: Jamie Walch <jamiewalch@chromium.org>
Commit-Queue: Joe Downing <joedow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721206}