Revert 105710 - Introduce RadioButtonGroup class to keep track of the group members and required st…

LayoutTests/fast/forms/script-tests/ValidityState-valueMissing-radio.js

Index: LayoutTests/fast/forms/script-tests/ValidityState-valueMissing-radio.js
===================================================================
--- LayoutTests/fast/forms/script-tests/ValidityState-valueMissing-radio.js	(revision 111481)
+++ LayoutTests/fast/forms/script-tests/ValidityState-valueMissing-radio.js	(working copy)
@@ -10,8 +10,11 @@
 var inputs = document.getElementsByName('victim');
 debug('No checked button:');
 shouldBeTrue('inputs[0].validity.valueMissing');
-shouldBeTrue('inputs[1].validity.valueMissing');
-shouldBeTrue('inputs[2].validity.valueMissing');
+// The following result should be false because the element does not have
+// "required".  It conforms to HTML5, and this behavior has no practical
+// problems.
+shouldBeFalse('inputs[1].validity.valueMissing');
+shouldBeFalse('inputs[2].validity.valueMissing');
 debug('The second button has been checked:');
 inputs[1].checked = true;
 shouldBeFalse('inputs[0].validity.valueMissing');
@@ -28,7 +31,6 @@
 shouldBeFalse('inputs[1].validity.valueMissing');
 shouldBeFalse('inputs[2].validity.valueMissing');
 
-debug('');
 debug('With form element');
 parent.innerHTML = '<form>'
     + '<input name=victim type=radio required>'
@@ -38,8 +40,9 @@
 inputs = document.getElementsByName('victim');
 debug('No checked button:');
 shouldBeTrue('inputs[0].validity.valueMissing');
-shouldBeTrue('inputs[1].validity.valueMissing');
-shouldBeTrue('inputs[2].validity.valueMissing');
+// The following result should be false.
+shouldBeFalse('inputs[1].validity.valueMissing');
+shouldBeFalse('inputs[2].validity.valueMissing');
 debug('The first button has been checked:');
 inputs[0].checked = true;
 shouldBeFalse('inputs[0].validity.valueMissing');
@@ -55,22 +58,3 @@
 shouldBeFalse('inputs[0].validity.valueMissing');
 shouldBeFalse('inputs[1].validity.valueMissing');
 shouldBeFalse('inputs[2].validity.valueMissing');
-
-debug('');
-debug('Not in a radio button group');
-var requiredButton = document.createElement('input');
-requiredButton.type = 'radio';
-requiredButton.name = 'victim';
-requiredButton.required = true;
-shouldBeFalse('requiredButton.validity.valueMissing');
-
-parent.innerHTML = '<input name=victim type=radio required><input name=victim type=radio>';
-requiredButton = document.getElementsByName('victim')[0];
-var button = document.getElementsByName('victim')[1];
-shouldBeTrue('requiredButton.validity.valueMissing');
-shouldBeTrue('button.validity.valueMissing');
-parent.removeChild(button);
-shouldBeFalse('button.validity.valueMissing');
-parent.removeChild(requiredButton);
-shouldBeFalse('requiredButton.validity.valueMissing');
-