Styles pane is made work with IPC. Still not work and will be fixed later:...

webkit/glue/devtools/js/devtools.js

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview Tools is a main class that wires all components of the 
  * DevTools frontend together. It is also responsible for overriding existing
  * WebInspector functionality while it is getting upstreamed into WebCore.
  */
 goog.provide('devtools.Tools');
@@ skipping 206 matching lines @@
 
 WebInspector.ElementsPanel.prototype.jumpToPreviousSearchResult = function() {
 };
 
 
 WebInspector.Console.prototype._evalInInspectedWindow = function(expr) {
   return devtools.tools.evaluate(expr);
 };
 
 
+WebInspector.ElementsPanel.prototype.updateStyles = function(forceUpdate) {
+  var stylesSidebarPane = this.sidebarPanes.styles;
+  if (!stylesSidebarPane.expanded || !stylesSidebarPane.needsUpdate)
+    return;
+   
+  var node = this.focusedDOMNode;
+  if (node && node.nodeType === Node.TEXT_NODE && node.parentNode)
+    node = node.parentNode;
+  
+  if (node && node.nodeType == Node.ELEMENT_NODE) {
+    var callback = function() {
+      stylesSidebarPane.update(node, null, forceUpdate);
+      stylesSidebarPane.needsUpdate = false;
+    };
+
+    devtools.tools.getDomAgent().getNodeStylesAsync(node,
+        !Preferences.showUserAgentStyles, callback);
+  } else {
+    stylesSidebarPane.update(null, null, forceUpdate);
+    stylesSidebarPane.needsUpdate = false;
+  }
+};
+
+
 WebInspector.PropertiesSidebarPane.prototype.update = function(object) {
   var body = this.bodyElement;
   body.removeChildren();
 
   this.sections = [];
 
   if (!object) {
     return;
   }
 
@@ skipping 80 matching lines @@
   }
   properties.sort();
 
   treeOutline.removeChildren();
 
   for (var i = 0; i < properties.length; ++i) {
     var propertyName = properties[i];
     treeOutline.appendChild(new constructor(obj, propertyName));
   }
 };