DevTools: introduce object previews experiment

third_party/WebKit/Source/devtools/front_end/sources/WatchExpressionsSidebarPane.js

 /*
  * Copyright (C) IBM Corp. 2009  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 317 matching lines @@
     deleteButton.addEventListener('click', this._deleteWatchExpression.bind(this), false);
 
     var titleElement = headerElement.createChild('div', 'watch-expression-title');
     this._nameElement = Components.ObjectPropertiesSection.createNameElement(this._expression);
     if (!!exceptionDetails || !result) {
       this._valueElement = createElementWithClass('span', 'watch-expression-error value');
       titleElement.classList.add('dimmed');
       this._valueElement.textContent = Common.UIString('<not available>');
     } else {
       this._valueElement = Components.ObjectPropertiesSection.createValueElementWithCustomSupport(
-          result, !!exceptionDetails, titleElement, this._linkifier);
+          result, !!exceptionDetails, false /* showPreview */, titleElement, this._linkifier);
     }
     var separatorElement = createElementWithClass('span', 'watch-expressions-separator');
     separatorElement.textContent = ': ';
     titleElement.appendChildren(this._nameElement, separatorElement, this._valueElement);
 
     this._element.removeChildren();
     this._objectPropertiesSection = null;
     if (!exceptionDetails && result && result.hasChildren && !result.customPreview()) {
       headerElement.classList.add('watch-expression-object-header');
       this._objectPropertiesSection = new Components.ObjectPropertiesSection(result, headerElement, this._linkifier);
@@ skipping 68 matching lines @@
     InspectorFrontendHost.copyText(this._valueElement.textContent);
   }
 };
 
 Sources.WatchExpression._watchObjectGroupId = 'watch-group';
 
 /** @enum {symbol} */
 Sources.WatchExpression.Events = {
   ExpressionUpdated: Symbol('ExpressionUpdated')
 };