DevTools: Fix http/tests/inspector/search/scripts-search-scope.htm test.

BUG=268246,263313
TBR=pfeldman

Review URL: https://codereview.chromium.org/22302003

git-svn-id: svn://svn.chromium.org/blink/trunk@155694 bbb929c8-8fbe-4397-9dbb-9b2b20218538