DevTools: only set title w/ shortcut via Tooltip manager API.

Source/devtools/front_end/components/ObjectPropertiesSection.js

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * 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 240 matching lines @@
         separatorElement.textContent = ": ";
 
         if (this.property.value) {
             this.valueElement = WebInspector.ObjectPropertiesSection.createValueElementWithCustomSupport(this.property.value, this.property.wasThrown, this.listItemElement);
             this.valueElement.addEventListener("contextmenu", this._contextMenuFired.bind(this, this.property.value), false);
         } else if (this.property.getter) {
             this.valueElement = WebInspector.ObjectPropertyTreeElement.createRemoteObjectAccessorPropertySpan(this.property.parentObject, [this.property.name], this._onInvokeGetterClick.bind(this));
         } else {
             this.valueElement = createElementWithClass("span", "object-value-undefined");
             this.valueElement.textContent = WebInspector.UIString("<unreadable>");
-            WebInspector.Tooltip.install(this.valueElement, WebInspector.UIString("No property getter"));
+            this.valueElement.title = WebInspector.UIString("No property getter");
         }
 
         this.listItemElement.removeChildren();
         this.listItemElement.appendChildren(this.nameElement, separatorElement, this.valueElement);
     },
 
     _contextMenuFired: function(value, event)
     {
         var contextMenu = new WebInspector.ContextMenu(event);
         contextMenu.appendApplicableItems(value);
@@ skipping 970 matching lines @@
                 return;
             if (token === "(") {
                 params = [];
                 return;
             }
             if (params && tokenType === "js-def")
                 params.push(token);
         }
     }
 }