https://bugs.webkit.org/show_bug.cgi?id=42814

Reviewed by Darin Adler.

WebCore:

According to the HTML5 specification, maxLength attribute should
be applied to text, search, url, tel, email, and password types.

Test: fast/forms/input-maxlength-unsupported.html

* dom/InputElement.cpp:
(WebCore::InputElement::handleBeforeTextInsertedEvent):
 Apply maxLength() only if supportsMaxLength() is true.
* dom/InputElement.h:
* html/HTMLInputElement.cpp:
(WebCore::HTMLInputElement::patternMismatch):
 Code cleanup by isTextType().
(WebCore::HTMLInputElement::tooLong):
 ditto.
(WebCore::HTMLInputElement::isTextType):
 Added. This returns true for types with maxLength/pattern/placeholder.
* html/HTMLInputElement.h:
(WebCore::HTMLInputElement::supportsMaxLength):
 Added. Just calls isTextType().
(WebCore::HTMLInputElement::supportsPlaceholder):
 Code cleanup by isTextType().
* wml/WMLInputElement.h:
(WebCore::WMLInputElement::supportsMaxLength):
 Added. Always returns true.

LayoutTests:

* fast/forms/input-maxlength-unsupported-expected.txt: Added.
* fast/forms/input-maxlength-unsupported.html: Added.
* fast/forms/script-tests/input-maxlength-unsupported.js: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@63942 268f45cc-cd09-0410-ab3c-d52691b4dbfc