base::StartsWithASCII() -> base::StartsWith().

Will be needed for a //base update.

(These changes correspond to Chromium base changes at Chromium revision
955093110ad64d5ec6f5426991efaa4a680b5d6f.

R=johnmccutchan@google.com

Review URL: https://codereview.chromium.org/2006303002 .
2 files changed