Fix update of validity cache value, so that it reflects the correct state of any FormControlElement.

LayoutTests/fast/forms/number/number-validity-badinput.html

Index: LayoutTests/fast/forms/number/number-validity-badinput.html
diff --git a/LayoutTests/fast/forms/number/number-validity-badinput.html b/LayoutTests/fast/forms/number/number-validity-badinput.html
index ebd68e4a24b06834393514ab4032e3849cda0508..a743ee9b1bb6c292f37c5acb502a1c230379afcb 100644
--- a/LayoutTests/fast/forms/number/number-validity-badinput.html
+++ b/LayoutTests/fast/forms/number/number-validity-badinput.html
@@ -46,7 +46,7 @@ shouldBe('colorOf(number)', 'invalidStyleColor');
 shouldBeTrue('number.validity.badInput');
 shouldBeEqualToString('number.value', '');
 
-debug("The element losts focus. The element state should not be changed.");
+debug("The element looses focus. The element state should not be changed.");
 document.getElementById('another').focus();
 shouldBe('colorOf(number)', 'invalidStyleColor');
 shouldBeTrue('number.validity.badInput');
@@ -56,7 +56,7 @@ document.execCommand('SelectAll');
 shouldBeEqualToString('document.getSelection().toString()', '-1a');
 shouldBeEqualToString('number.value', '');
 
-debug("The element losts a renderer. The element state should not be changed.");
+debug("The element looses renderer. The element state should not be changed.");
 shouldBeTrue('number.style.display = "none"; number.validity.badInput');
 
 number.style.display = 'inline-block';
@@ -64,6 +64,17 @@ number.focus();
 debug('A bad input should be cleared by value="".');
 shouldBeEqualToString('number.value = ""; document.execCommand("SelectAll"); document.getSelection().toString()', '');
 
+debug('badInput and checkValidty() should be updated by value= "some valid number"');
+number.focus();
+debug('Type some text (invalid input)');
+document.execCommand('InsertText', false, 'g');
+shouldBeTrue('number.validity.badInput');
+shouldBeFalse('number.checkValidity()');
+debug('Now set a valid value');
+number.value = '1';
+shouldBeFalse('number.validity.badInput');
+shouldBeTrue('number.checkValidity()');
+
 document.getElementById('parent').innerHTML = '';
 </script>
 </body>