Implement basic theming for panel titlebars.

chrome/browser/ui/panels/panel_browser_window_cocoa_unittest.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.
 
 #import "chrome/browser/ui/panels/panel_browser_window_cocoa.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
@@ skipping 290 matching lines @@
   EXPECT_TRUE([close_window_menu_item isEnabled]);
   EXPECT_TRUE([find_menu_item isEnabled]);
   EXPECT_TRUE([find_previous_menu_item isEnabled]);
   EXPECT_TRUE([find_next_menu_item isEnabled]);
   EXPECT_FALSE([fullscreen_menu_item isEnabled]);
   EXPECT_FALSE([presentation_menu_item isEnabled]);
   EXPECT_FALSE([bookmarks_menu_item isEnabled]);
 
   ClosePanelAndWait(panel->browser());
 }
+
+// Verify that the theme provider is properly plumbed through.
+TEST_F(PanelBrowserWindowCocoaTest, ThemeProvider) {
+  Panel* panel = CreateTestPanel("Test Panel");
+  ASSERT_TRUE(panel);
+
+  PanelBrowserWindowCocoa* native_window =
+      static_cast<PanelBrowserWindowCocoa*>(panel->native_panel());
+  ASSERT_TRUE(native_window);
+  EXPECT_TRUE(NULL != [[native_window->controller_ window] themeProvider]);
+  ClosePanelAndWait(panel->browser());
+}

[Dmitry Titov, 2011/08/31 01:01:30]

We also need a test now that verifies that titlebar is actually updated when
Panel->UpdateTitleBar is called.  you can pull it from native window.

[dcheng, 2011/08/31 23:58:03]

Done.