Start using URI keyboard type for <input type="url" />

Switch to use URI keyboard type for input fields with type url.
Previously we set it as WEB_EDIT_TEXT, due to <tab> button not showing
when URI type is set, however there is no guarantee that the keyboard
will keep the <tab> button anyway (see bug for more details).

BUG=306359
R=tedchoc@chromium.org

Review URL: https://codereview.chromium.org/103523002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239283 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239283