Allow a Views client to provide a default frameview for window widgets.

ui/views/test/test_views_delegate.h

 // 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.
 
 #ifndef UI_VIEWS_TEST_TEST_VIEWS_DELEGATE_H_
 #define UI_VIEWS_TEST_TEST_VIEWS_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 31 matching lines @@
   virtual void NotifyMenuItemFocused(const string16& menu_name,
                                      const string16& menu_item_name,
                                      int item_index,
                                      int item_count,
                                      bool has_submenu) OVERRIDE {}
 #if defined(OS_WIN)
   virtual HICON GetDefaultWindowIcon() const OVERRIDE {
     return NULL;
   }
 #endif
-
+  virtual NonClientFrameView* CreateDefaultNonClientFrameView(
+      Widget* widget) OVERRIDE;
   virtual void AddRef() OVERRIDE {}
   virtual void ReleaseRef() OVERRIDE {}
 
   virtual int GetDispositionForEvent(int event_flags) OVERRIDE;
 
  private:
   mutable scoped_ptr<ui::Clipboard> clipboard_;
 
   DISALLOW_COPY_AND_ASSIGN(TestViewsDelegate);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_TEST_TEST_VIEWS_DELEGATE_H_