Fixed FIXME in WebSearchableFormData.

BUG=

Review URL: https://codereview.chromium.org/84573002

git-svn-id: svn://svn.chromium.org/blink/trunk@162628 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Improve NumberInputType exception messages.

BUG=270033

Review URL: https://codereview.chromium.org/85473003

git-svn-id: svn://svn.chromium.org/blink/trunk@162629 bbb929c8-8fbe-4397-9dbb-9b2b20218538