Revert 140817 "Web Inspector: [Styles] Editing a property value ..."

Source/WebCore/inspector/front-end/StylesSidebarPane.js

 /*
  * Copyright (C) 2007 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.
@@ skipping 2071 matching lines @@
 
         if (this.treeOutline.section && !this.treeOutline.section.editable)
             return;
 
         if (!selectElement)
             selectElement = this.nameElement; // No arguments passed in - edit the name element by default.
         else
             selectElement = selectElement.enclosingNodeOrSelfWithClass("webkit-css-property") || selectElement.enclosingNodeOrSelfWithClass("value");
 
         var isEditingName = selectElement === this.nameElement;
-        if (!isEditingName) {
-            if (selectElement !== this.valueElement) {
-                // Click in the LI - start editing value.
-                isEditingName = false;
-                selectElement = this.valueElement;
-            }
-
-            this.valueElement.textContent = this.value;
+        if (!isEditingName && selectElement !== this.valueElement) {
+            // Double-click in the LI - start editing value.
+            isEditingName = false;
+            selectElement = this.valueElement;
         }
 
         if (WebInspector.isBeingEdited(selectElement))
             return;
 
         var context = {
             expanded: this.expanded,
             hasChildren: this.hasChildren,
             isEditingName: isEditingName,
             previousContent: selectElement.textContent
@@ skipping 491 matching lines @@
         if (!prefix && !force)
             return;
 
         var results = this._cssCompletions.startsWith(prefix);
         var selectedIndex = this._cssCompletions.mostUsedOf(results);
         completionsReadyCallback(results, selectedIndex);
     },
 
     __proto__: WebInspector.TextPrompt.prototype
 }