Minimum size for aura window

ui/aura/test/test_window_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/aura/test/test_window_delegate.h"
 
 #include "ui/aura/hit_test.h"
 
 namespace aura {
 namespace test {
@@ skipping 12 matching lines @@
 }
 
 void TestWindowDelegate::OnBlur() {
 }
 
 bool TestWindowDelegate::OnKeyEvent(KeyEvent* event) {
   return false;
 }
 
 gfx::NativeCursor TestWindowDelegate::GetCursor(const gfx::Point& point) {
-  return NULL;
+  return gfx::kNullCursor;
 }
 
 int TestWindowDelegate::GetNonClientComponent(const gfx::Point& point) const {
   return HTCLIENT;
 }
 
 bool TestWindowDelegate::OnMouseEvent(MouseEvent* event) {
   return false;
 }
 
@@ skipping 21 matching lines @@
 }
 
 void TestWindowDelegate::OnWindowDestroyed() {
 }
 
 void TestWindowDelegate::OnWindowVisibilityChanged(bool visible) {
 }
 
 }  // namespace test
 }  // namespace aura