Mac: Prevent NTP mousewheel events from being suppressed on Lion.

chrome/browser/resources/ntp4/tile_page.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 cr.define('ntp', function() {
   'use strict';
 
   // We can't pass the currently dragging tile via dataTransfer because of
   // http://crbug.com/31037
   var currentlyDraggingTile = null;
@@ skipping 430 matching lines @@
       // These are properties used in updateTopMargin.
       this.animatedTopMarginPx_ = 0;
       this.topMarginPx_ = 0;
 
       this.eventTracker = new EventTracker();
       this.eventTracker.add(window, 'resize', this.onResize_.bind(this));
 
       this.addEventListener('DOMNodeInsertedIntoDocument',
                             this.onNodeInsertedIntoDocument_);
 
-      this.addEventListener('mousewheel', this.onMouseWheel_);
+//      this.addEventListener('mousewheel', this.onMouseWheel_);

[Patrick Dubroy, 2012/04/16 21:27:59]

This should have a bool value passed in to indicate whether or not the
mousewheel events should be ignored, just like card_slider

       this.content_.addEventListener('scroll', this.onScroll_.bind(this));
 
       this.dragWrapper_ = new cr.ui.DragWrapper(this.tileGrid_, this);
 
       this.addEventListener('cardselected', this.handleCardSelection_);
       this.addEventListener('carddeselected', this.handleCardDeselection_);
       this.addEventListener('focus', this.handleFocus_);
       this.addEventListener('keydown', this.handleKeyDown_);
       this.addEventListener('mousedown', this.handleMouseDown_);
 
@@ skipping 871 matching lines @@
       assert(false);
     },
   };
 
   return {
     getCurrentlyDraggingTile: getCurrentlyDraggingTile,
     setCurrentDropEffect: setCurrentDropEffect,
     TilePage: TilePage,
   };
 });