Remove last two functions in LocalizedStrings.

Use Locale::queryString instead.

BUG=298020
TEST=none; no behavior changes.

Review URL: https://codereview.chromium.org/26440004

git-svn-id: svn://svn.chromium.org/blink/trunk@159435 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Implement <form method=dialog>

As described in the spec:
http://www.whatwg.org/specs/web-apps/current-work/multipage/association-of-controls-and-forms.html#form-submission-0
http://www.whatwg.org/specs/web-apps/current-work/multipage/association-of-controls-and-forms.html#submit-dialog

When a dialog is submitted, the dialog is closed and the submit button's
value is passed to dialog.close(). 

Still to do: handle submission through <input type=image> 

BUG=304827

Review URL: https://codereview.chromium.org/26793005

git-svn-id: svn://svn.chromium.org/blink/trunk@159436 bbb929c8-8fbe-4397-9dbb-9b2b20218538