Inappropriate validation message for required number/date input elements
https://bugs.webkit.org/show_bug.cgi?id=111982

Reviewed by Kentaro Hara.

Source/WebCore:

For validation message, badInput messages should take precedence
over valueMissing messages because users already filled out the
field with a bad value.

Tests: Update fast/forms/validationMessage.html

* html/InputType.cpp:
(WebCore::InputType::validationMessage):
Check badInput first.

LayoutTests:

* fast/forms/validationMessage-expected.txt:
* fast/forms/validationMessage.html:
* platform/chromium/fast/forms/validationMessage-expected.txt:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@145362 268f45cc-cd09-0410-ab3c-d52691b4dbfc