Revert "Dartium w/ JsInterop enabled"

tools/dom/src/CssRectangle.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of html;
 
 /**
  * A rectangle representing all the content of the element in the
  * [box model](http://www.w3.org/TR/CSS2/box.html).
  */
 class _ContentCssRect extends CssRect {
 
   _ContentCssRect(element) : super(element);
 
   num get height => _element.offsetHeight +
       _addOrSubtractToBoxModel(_HEIGHT, _CONTENT);
 
   num get width => _element.offsetWidth +
       _addOrSubtractToBoxModel(_WIDTH, _CONTENT);
 
   /**
    * Set the height to `newHeight`.
    *
    * newHeight can be either a [num] representing the height in pixels or a
    * [Dimension] object. Values of newHeight that are less than zero are
    * converted to effectively setting the height to 0. This is equivalent to the
    * `height` function in jQuery and the calculated `height` CSS value,
    * converted to a num in pixels.
    */
-  set height(newHeight) {
+  void set height(newHeight) {
     if (newHeight is Dimension) {
       if (newHeight.value < 0) newHeight = new Dimension.px(0);
       _element.style.height = newHeight.toString();
     } else {
       if (newHeight < 0) newHeight = 0;
       _element.style.height = '${newHeight}px';
     }
   }
 
   /**
    * Set the current computed width in pixels of this element.
    *
    * newWidth can be either a [num] representing the width in pixels or a
    * [Dimension] object. This is equivalent to the `width` function in jQuery
    * and the calculated
    * `width` CSS value, converted to a dimensionless num in pixels.
    */
-  set width(newWidth) {
+  void set width(newWidth) {
     if (newWidth is Dimension) {
       if (newWidth.value < 0) newWidth = new Dimension.px(0);
       _element.style.width = newWidth.toString();
     } else {
       if (newWidth < 0) newWidth = 0;
       _element.style.width = '${newWidth}px';
     }
   }
 
   num get left => _element.getBoundingClientRect().left -
@@ skipping 14 matching lines @@
   }
 
   /**
    * Set the height to `newHeight`.
    *
    * Values of newHeight that are less than zero are converted to effectively
    * setting the height to 0. This is equivalent to the `height`
    * function in jQuery and the calculated `height` CSS value, converted to a
    * num in pixels.
    */
-  set height(newHeight) {
+  void set height(newHeight) {
     _elementList.forEach((e) => e.contentEdge.height = newHeight);
   }
 
   /**
    * Set the current computed width in pixels of this element.
    *
    * This is equivalent to the `width` function in jQuery and the calculated
    * `width` CSS value, converted to a dimensionless num in pixels.
    */
-  set width(newWidth) {
+  void set width(newWidth) {
     _elementList.forEach((e) => e.contentEdge.width = newWidth);
   }
 }
 
 /**
  * A rectangle representing the dimensions of the space occupied by the
  * element's content + padding in the
  * [box model](http://www.w3.org/TR/CSS2/box.html).
  */
 class _PaddingCssRect extends CssRect {
@@ skipping 86 matching lines @@
    * Set the height to `newHeight`.
    *
    * newHeight can be either a [num] representing the height in pixels or a
    * [Dimension] object. Values of newHeight that are less than zero are
    * converted to effectively setting the height to 0. This is equivalent to the
    * `height` function in jQuery and the calculated `height` CSS value,
    * converted to a num in pixels.
    *
    * Note that only the content height can actually be set via this method.
    */
-  set height(newHeight) {
+  void set height(newHeight) {
     throw new UnsupportedError("Can only set height for content rect.");
   }
 
   /**
    * Set the current computed width in pixels of this element.
    *
    * newWidth can be either a [num] representing the width in pixels or a
    * [Dimension] object. This is equivalent to the `width` function in jQuery
    * and the calculated
    * `width` CSS value, converted to a dimensionless num in pixels.
    *
    * Note that only the content width can be set via this method.
    */
-  set width(newWidth) {
+  void set width(newWidth) {
     throw new UnsupportedError("Can only set width for content rect.");
   }
 
   /**
    * Return a value that is used to modify the initial height or width
    * measurement of an element. Depending on the value (ideally an enum) passed
    * to augmentingMeasurement, we may need to add or subtract margin, padding,
    * or border values, depending on the measurement we're trying to obtain.
    */
   num _addOrSubtractToBoxModel(List<String> dimensions,
@@ skipping 28 matching lines @@
     }
     return val;
   }
 }
 
 final _HEIGHT = ['top', 'bottom'];
 final _WIDTH = ['right', 'left'];
 final _CONTENT = 'content';
 final _PADDING = 'padding';
 final _MARGIN = 'margin';