GitLab

This means that there are no longer any expected results in
LayoutTests/platform/chromium/..., so this location is removed from the
fallback path.

Also updates an inspector tool and a rebaseline unit test.

BUG=229807
R=abarth,pfeldman

Review URL: https://codereview.chromium.org/14166003

git-svn-id: svn://svn.chromium.org/blink/trunk@148246 bbb929c8-8fbe-4397-9dbb-9b2b20218538