add compact layout manager window transition unittest.

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/shell.h"
 #include "ash/shell_window_ids.h"
@@ skipping 26 matching lines @@
 
 AppListViewDelegate* TestShellDelegate::CreateAppListViewDelegate() {
   return NULL;
 }
 
 std::vector<aura::Window*> TestShellDelegate::GetCycleWindowList(
     CycleSource source,
     CycleOrder order) const {
   // We just use the Shell's default container of windows, so tests can be
   // written with the usual CreateTestWindowWithId() calls. But window cycling
-  // expects the topmost window at the front of the list, so reverse the order.
+  // expects the topmost window at the front of the list, so reverse the order
+  // if we are mimicking MRU.
   aura::Window* default_container = Shell::GetInstance()->GetContainer(
       internal::kShellWindowId_DefaultContainer);
   std::vector<aura::Window*> windows = default_container->children();
-  std::reverse(windows.begin(), windows.end());
+  if (order != ShellDelegate::ORDER_LINEAR)
+    std::reverse(windows.begin(), windows.end());
   return windows;
 }
 
 void TestShellDelegate::CreateNewWindow() {
 }
 
 void TestShellDelegate::LauncherItemClicked(const LauncherItem& item) {
 }
 
 int TestShellDelegate::GetBrowserShortcutResourceId() {
   return IDR_AURA_LAUNCHER_BROWSER_SHORTCUT;
 }
 
 string16 TestShellDelegate::GetLauncherItemTitle(const LauncherItem& item) {
   return string16();
 }
 
 }  // namespace test
 }  // namespace ash