DevTools: Remove ScriptFile for snippet uiSourceCodes.
DevTools: Remove ScriptFile for snippet uiSourceCodes.

R=pfeldman

Review URL: https://codereview.chromium.org/238893002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@171566 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs