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

ui/views/test/test_views_delegate.cc

 // 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 "ui/views/test/test_views_delegate.h"
 
 #include "base/logging.h"
 #include "ui/base/clipboard/clipboard.h"
 
 namespace views {
@@ skipping 21 matching lines @@
                                             ui::WindowShowState show_state) {
 }
 
 bool TestViewsDelegate::GetSavedWindowPlacement(
     const std::string& window_name,
     gfx::Rect* bounds,
     ui:: WindowShowState* show_state) const {
   return false;
 }
 
+NonClientFrameView* TestViewsDelegate::CreateDefaultNonClientFrameView(
+    Widget* widget) {
+  return NULL;
+}
+
 int TestViewsDelegate::GetDispositionForEvent(int event_flags) {
   return 0;
 }
 
 }  // namespace views