Implement basic theming for panel titlebars.

chrome/browser/ui/panels/panel_browser_window_cocoa.mm

 // Copyright (c) 2011 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.
 
 #include "chrome/browser/ui/panels/panel_browser_window_cocoa.h"
 
 #include "base/logging.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/cocoa/find_bar/find_bar_bridge.h"
 #import "chrome/browser/ui/cocoa/browser_window_utils.h"
@@ skipping 108 matching lines @@
 bool PanelBrowserWindowCocoa::IsPanelActive() const {
   NOTIMPLEMENTED();
   return false;
 }
 
 gfx::NativeWindow PanelBrowserWindowCocoa::GetNativePanelHandle() {
   return [controller_ window];
 }
 
 void PanelBrowserWindowCocoa::UpdatePanelTitleBar() {
-  NOTIMPLEMENTED();
+  if (!is_shown_)
+    return;
+  [controller_ updateTitleBar];
 }
 
 void PanelBrowserWindowCocoa::ShowTaskManagerForPanel() {
   NOTIMPLEMENTED();
 }
 
 FindBar* PanelBrowserWindowCocoa::CreatePanelFindBar() {
   DCHECK(!has_find_bar_) << "find bar should only be created once";
   has_find_bar_ = true;
 
@@ skipping 55 matching lines @@
   panel_->manager()->Remove(panel_.get());
   controller_ = NULL;
 }
 // NativePanelTesting implementation.
 
 // static
 NativePanelTesting* NativePanelTesting::Create(NativePanel* native_panel) {
   NOTIMPLEMENTED();
   return NULL;
 }