Ensure we never remove the style attribute when syncing it from CSSOM.

third_party/WebKit/LayoutTests/editing/undo/remove-css-property-and-remove-style.html

 <script src="../../resources/dump-as-markup.js"></script>
-<p>This tests removing style attribute after removing CSS property. Undo should bring back the CSS property we removed.</p>
+<p>This tests removing style after removing CSS property. Undo should bring back the CSS property we removed.</p>
 <div id="test" contenteditable><span style="font-weight: 900;">test</span></div>
 <script>
 
-Markup.description('This tests removing style attribute after removing CSS property. Undo should bring back the CSS property we removed.');
+Markup.description('This tests removing style after removing CSS property. Undo should bring back the CSS property we removed.');
 
 Markup.dump('test', 'Initially "test" should be bold wrapped with a span');
 window.getSelection().selectAllChildren(test);
 document.execCommand('bold', false, null);
 Markup.dump('test', 'Unbolding should remove the CSS style and also remove the span');
 
 document.execCommand('undo', false, null);
-Markup.dump('test', 'Undo should bring back both the span and style attribute so that "test" is once again bold');
+Markup.dump('test', 'Undo should bring back both the span and style so that "test" is once again bold');
 
 document.execCommand('redo', false, null);
 Markup.dump('test', 'Redo should unbold "test" and there should be no span');
 
 document.execCommand('undo', false, null);
 Markup.dump('test', 'Undo once more');
 
 document.getElementById('test').innerHTML = '<span style="font-weight: 900;">test</span>';
 var span = document.getElementById('test').firstChild;
 span.id = 'test_span';
 span.title = 'hello, world';
 window.getSelection().selectAllChildren(test);
 Markup.dump('test', 'Reset, and added id and title');
 
 document.execCommand('bold', false, null);
 Markup.dump('test', 'Unbolding should remove the CSS style but shouldn\'t remove the span');
 
 document.execCommand('undo', false, null);
-Markup.dump('test', 'Undo should restore the style attribute and "test" should be bold');
+Markup.dump('test', 'Undo should restore the style and "test" should be bold');
 
 document.execCommand('redo', false, null);
-Markup.dump('test', 'Redo should remove the style attribute again');
+Markup.dump('test', 'Redo should remove the style again');
 
 document.getElementById('test').innerHTML = '<span style="font-weight: 900;">test</span>';
 var span = document.getElementById('test').firstChild;
 span.style.color = 'blue';
 window.getSelection().selectAllChildren(test);
 Markup.dump('test', 'Reset, and added color:blue');
 
 document.execCommand('bold', false, null);
-Markup.dump('test', 'Unbolding should remove the font-weight but shouldn\'t remove the style attribute');
+Markup.dump('test', 'Unbolding should remove the font-weight but shouldn\'t remove the style ');
 
 document.execCommand('undo', false, null);
-Markup.dump('test', 'Undo should reset the style attribute so that "test" is both bold and blue');
+Markup.dump('test', 'Undo should reset the style so that "test" is both bold and blue');
 
 document.execCommand('redo', false, null);
 Markup.dump('test', 'Redo should only remove font-weight and leave "test" blue');
 
 document.execCommand('foreColor', false, "#000000");
-Markup.dump('test', 'Setting the forecolor to black should remove both the style attribute and the span');
+Markup.dump('test', 'Setting the forecolor to black should remove both the style and the span');
 
 document.execCommand('undo', false, null);
 Markup.dump('test', 'Undo should make "test" blue again');
 
 </script>