Aura: Remove overlapping window mode

ash/test/test_shell_delegate.cc

 // Copyright (c) 2012 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 "ash/test/test_shell_delegate.h"
 
 #include <algorithm>
 
 #include "ash/screenshot_delegate.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "grit/ui_resources.h"
 #include "ui/aura/window.h"
 
 namespace ash {
 namespace test {
 
 TestShellDelegate::TestShellDelegate()
     : override_window_mode_(false),
-      window_mode_(Shell::MODE_OVERLAPPING) {
+      window_mode_(Shell::MODE_MANAGED) {
 }
 
 TestShellDelegate::~TestShellDelegate() {
 }
 
 void TestShellDelegate::SetOverrideWindowMode(Shell::WindowMode window_mode) {
   override_window_mode_ = true;
   window_mode_ = window_mode;
 }
 
@@ skipping 47 matching lines @@
 bool TestShellDelegate::GetOverrideWindowMode(Shell::WindowMode* window_mode) {
   if (override_window_mode_) {
     *window_mode = window_mode_;
     return true;
   }
   return false;
 }
 
 }  // namespace test
 }  // namespace ash