Move the individual property definitions from client/base/Css to CSSStyleDeclaration.

client/base/AnimationScheduler.dart

 // Copyright (c) 2011, 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.
 
 typedef void AnimationCallback(num currentTime);
 
 class CallbackData {
   final AnimationCallback callback;
   final num minTime;
   int id;
@@ skipping 23 matching lines @@
 // 60fps for the current browser.
 class AnimationScheduler {
   static final FRAMES_PER_SECOND = 60;
   static final MS_PER_FRAME = 1000 ~/ FRAMES_PER_SECOND;
   static final USE_INTERVALS = false;
 
   /** List of callbacks to be executed next animation frame. */
   List<CallbackData> _callbacks;
   int _intervalId;
   bool _isMobileSafari = false;
-  Css _safariHackCss;
+  CSSStyleDeclaration _safariHackStyle;
   int _frameCount = 0;
   bool _webkitAnimationFrameMaybeAvailable = true;
 
   AnimationScheduler()
     : _callbacks = new List<CallbackData>() {
     if (_isMobileSafari) {
       // TODO(jacobr): find a better workaround for the issue that 3d transforms
       // sometimes don't render on iOS without forcing a layout.
       final element = new Element.tag('div');
       document.body.nodes.add(element);
-      _safariHackCss = new Css(element.style);
-      _safariHackCss.position = 'absolute';
+      _safariHackStyle = element.style;
+      _safariHackStyle.position = 'absolute';
     }
   }
 
   /**
    * Cancel the pending callback matching the specified [id].
    * This is not heavily optimized as typically users don't cancel animation
    * frames.
    */
   void cancelRequestAnimationFrame(int id) {
     _callbacks = _callbacks.filter((CallbackData e) => e.id != id);
@@ skipping 86 matching lines @@
         _callbacks.add(callbackData);
       }
     }
 
     _frameCount++;
     if (_isMobileSafari) {
       // Hack to work around an iOS bug where sometimes animations do not
       // render if only webkit transforms were modified.
       // TODO(jacobr): find a cleaner workaround.
       int offset = _frameCount % 2;
-      _safariHackCss.left = '${offset}px';
+      _safariHackStyle.left = '${offset}px';
     }
   }
 }