Service worker registration error support

This patch introduces use of WebServiceWorkerError as a means to propagate an
error from the browser to the renderer, and further reflect this error via
WebCallbacks into Blink

BUG=285976
R=jam@chromium.org, michaeln@chromium.org, tsepez@chromium.org
TBR=abarth

Review URL: https://codereview.chromium.org/26442004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233438 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233438