Revert of DevTools: Make curtain handle dragging work again in Timeline overview

third_party/WebKit/Source/devtools/front_end/ui_lazy/OverviewGrid.js

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 183 matching lines @@
     },
 
     /**
      * @param {!Event} event
      */
     _resizerElementStartDragging: function(event)
     {
         if (!this._enabled)
             return false;
         this._resizerParentOffsetLeft = event.pageX - event.offsetX - event.target.offsetLeft;
-        event.stopPropagation();
+        event.preventDefault();
         return true;
     },
 
     /**
      * @param {!Event} event
      */
     _leftResizeElementDragging: function(event)
     {
         this._resizeWindowLeft(event.pageX - this._resizerParentOffsetLeft);
         event.preventDefault();
@@ skipping 242 matching lines @@
         position = Math.max(0, Math.min(position, this._width));
         if (position < this._startPosition) {
             this._windowSelector.style.left = position + "px";
             this._windowSelector.style.right = this._width - this._startPosition + "px";
         } else {
             this._windowSelector.style.left = this._startPosition + "px";
             this._windowSelector.style.right = this._width - position + "px";
         }
     }
 };