[Gtk] Properly set forms tests-specific settings

[Gtk] Properly set forms tests-specific settings
https://bugs.webkit.org/show_bug.cgi?id=81237

Patch by Zan Dobersek <zandobersek@gmail.com> on 2012-03-16
Reviewed by Philippe Normand.

Source/WebKit/gtk:

Call Settings::setInteractiveFormValidationEnabled and
Settings::setValidationMessageTimerMagnification with
proper values when in testing mode.

* webkit/webkitwebview.cpp:
(webkit_web_view_init):

LayoutTests:

Unskip newly-passing tests.

* platform/gtk/Skipped:
* platform/gtk/fast/forms/validation-message-appearance-expected.txt: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@110959 268f45cc-cd09-0410-ab3c-d52691b4dbfc