Fix DevToolsSanityTest.TestScriptsTabIsPopulatedOnInspectedPageRefresh after recent changes.

TBR=lushnikov
NOTRY=true

Review URL: https://codereview.chromium.org/207323005

git-svn-id: svn://svn.chromium.org/blink/trunk@169722 bbb929c8-8fbe-4397-9dbb-9b2b20218538