[DevTools] Fix ObjectPopover for objects not staying the same size

third_party/WebKit/Source/devtools/front_end/object_ui/ObjectPopoverHelper.js

 /*
  * Copyright (C) 2011 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 141 matching lines @@
           popoverContentElement = createElementWithClass('div', 'object-popover-content');
           UI.appendStyle(popoverContentElement, 'object_ui/objectPopover.css');
           var titleElement = popoverContentElement.createChild('div', 'monospace object-popover-title');
           titleElement.createChild('span').textContent = description;
           var section = new ObjectUI.ObjectPropertiesSection(result, '', this._lazyLinkifier());
           section.element.classList.add('object-popover-tree');
           section.titleLessMode();
           popoverContentElement.appendChild(section.element);
         }
         popover.setMaxContentSize(new UI.Size(300, 250));
-        popover.setSizeBehavior(UI.GlassPane.SizeBehavior.SetMaxSize);
+        popover.setSizeBehavior(UI.GlassPane.SizeBehavior.SetExactSize);
         popover.showForAnchor(popoverContentElement, anchorElement);
       }
     }
     this._disposed = false;
     this._queryObject(element, didQueryObject.bind(this), this._popoverObjectGroup);
   }
 
   _onHideObjectPopover() {
     this._disposed = true;
     if (this._resultHighlightedAsDOM) {
@@ skipping 16 matching lines @@
    * @return {!Components.Linkifier}
    */
   _lazyLinkifier() {
     if (!this._linkifier)
       this._linkifier = new Components.Linkifier();
     return this._linkifier;
   }
 };
 
 ObjectUI.ObjectPopoverHelper.MaxPopoverTextLength = 10000;