[DevTools] Get rid of floats in treeoutline.

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

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 107 matching lines @@
                 break;
             case DebuggerAgent.ScopeType.Global:
                 title = WebInspector.UIString("Global");
                 break;
             }
 
             var subtitle = scope.description();
             if (!title || title === subtitle)
                 subtitle = undefined;
 
-            var titleElement = createElementWithClass("div");
+            var titleElement = createElementWithClass("div", "scope-chain-sidebar-pane-section-header");
             titleElement.createChild("div", "scope-chain-sidebar-pane-section-subtitle").textContent = subtitle;
             titleElement.createChild("div", "scope-chain-sidebar-pane-section-title").textContent = title;
 
             var section = new WebInspector.ObjectPropertiesSection(scope.object(), titleElement, emptyPlaceholder, true, extraProperties);
             section[WebInspector.ScopeChainSidebarPane._pathSymbol] = title + ":" + (subtitle ? subtitle + ":" : "");
             section.addEventListener(TreeOutline.Events.ElementAttached, this._elementAttached, this);
             section.addEventListener(TreeOutline.Events.ElementExpanded, this._elementExpanded, this);
             section.addEventListener(TreeOutline.Events.ElementCollapsed, this._elementCollapsed, this);
 
             if (scope.type() === DebuggerAgent.ScopeType.Global)
@@ skipping 39 matching lines @@
      * @param {!WebInspector.ObjectPropertyTreeElement} treeElement
      * @return {string}
      */
     _propertyPath: function(treeElement)
     {
         return treeElement.treeOutline[WebInspector.ScopeChainSidebarPane._pathSymbol] + WebInspector.ObjectPropertyTreeElement.prototype.propertyPath.call(treeElement);
     },
 
     __proto__: WebInspector.SidebarPane.prototype
 }