Handle extra whitespaces in the DOM token list

third_party/WebKit/LayoutTests/fast/dom/HTMLElement/script-tests/class-list.js

 description('Tests the classList attribute and its properties.');
 
 var element;
 
 function createElement(className)
 {
     element = document.createElement('p');
     element.className = className;
 }
 
@@ skipping 52 matching lines @@
 shouldBeEqualToString('element.className', '');
 
 // http://simon.html5.org/test/html/dom/reflecting/DOMTokenList/getting/010.htm
 createElement('x');
 element.classList.remove('x');
 shouldBeEqualToString('element.className', '');
 
 // http://simon.html5.org/test/html/dom/reflecting/DOMTokenList/getting/011.htm
 createElement(' y x  y ');
 element.classList.remove('x');
-shouldBeEqualToString('element.className', ' y y ');
+shouldBeEqualToString('element.className', 'y y');
 
 // http://simon.html5.org/test/html/dom/reflecting/DOMTokenList/getting/012.htm
 createElement(' x y  x ');
 element.classList.remove('x');
 shouldBeEqualToString('element.className', 'y');
 
 
 debug('Ensure that we can handle empty class name correctly');
 element = document.createElement('span');
 shouldBeTrue("element.classList.toggle('x')");
@@ skipping 233 matching lines @@
 
 createElement('');
 shouldNotThrow('element.classList.add()');
 
 createElement('');
 var observer = new WebKitMutationObserver(function() {});
 observer.observe(element, {attributes: true});
 element.classList.add('a', 'c');
 shouldBe('observer.takeRecords().length', '1');
 
+createElement(' a  b c  ');
+element.classList.remove('a');
+shouldBeEqualToString("element.className", "b c");
+
+createElement(' a  b c  ');
+element.classList.remove('b');
+shouldBeEqualToString("element.className", "a c");
+
+createElement(' a  b c  ');
+element.classList.remove('c');
+shouldBeEqualToString("element.className", "a b");
 
 createElement('a b c d  ');
 element.classList.remove('a', 'c');
-shouldBeEqualToString('element.className', 'b d  ');
+shouldBeEqualToString('element.className', 'b d');
 
 element.classList.remove('b', 'b');
-shouldBeEqualToString('element.className', 'd  ');
+shouldBeEqualToString('element.className', 'd');
 
 createElement('a b c null d undefined 0 false');
 element.classList.remove(null, {toString: function() { return 'd' }}, undefined, 0, false);
 shouldBeEqualToString('element.className', 'a b c');
 
 createElement('a b');
 shouldThrowDOMException(function() {
     element.classList.remove('a', 'b', '');
 }, DOMException.SYNTAX_ERR);
 shouldBeEqualToString('element.className', 'a b');
@@ skipping 14 matching lines @@
 element.classList.remove('a', 'c');
 shouldBe('observer.takeRecords().length', '1');
 
 // iterable<DOMString>;
 createElement('a b c');
 var seen = [];
 for (var t of element.classList) {
     seen.push(t);
 }
 shouldBeTrue("areArraysEqual(seen, ['a', 'b', 'c'])");