Fix -[NSString isValidURI].

Use GURL for validation instead of NSURL. NSURL is extremely liberal
with what it considers a valid URI, since it also uses RFC 1808 to
parse.

BUG=43100
TEST=none

Review URL: http://codereview.chromium.org/1904001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@46318 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed