DevTools: fix typo in iPad iOS7 screen resolutions overrides
DevTools: fix typo in iPad iOS7 screen resolutions overrides

BUG=
TBR=vsevik

Review URL: https://codereview.chromium.org/26341009

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@159452 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