DevTools: SourcesPanel: Double-click on watch expression name should start editing.

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 148 matching lines @@
         console.assert(propertyValue);
         WebInspector.ObjectPropertyTreeElement.populate(this, propertyValue);
     },
 
     /**
      * @override
      * @return {boolean}
      */
     ondblclick: function(event)
     {
-        if ((this.property.writable || this.property.setter) && event.target.isSelfOrDescendant(this.valueElement))
+        var editableElement = this.elementAndValueToEdit().element;
+        if ((this.property.writable || this.property.setter) && event.target.isSelfOrDescendant(editableElement))
             this.startEditing(event);
         return false;
     },
 
     /**
      * @override
      */
     onattach: function()
     {
         this.update();
@@ skipping 902 matching lines @@
 {
     WebInspector.TextPrompt.call(this, WebInspector.ExecutionContextSelector.completionsForTextPromptInCurrentContext);
     this.setSuggestBoxEnabled(true);
     if (renderAsBlock)
         this.renderAsBlock();
 }
 
 WebInspector.ObjectPropertyPrompt.prototype = {
     __proto__: WebInspector.TextPrompt.prototype
 }