Refactor most recently used window tracking into a separate class.

chrome/browser/chromeos/extensions/wallpaper_private_api.cc

 // Copyright (c) 2013 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 "chrome/browser/chromeos/extensions/wallpaper_private_api.h"
 
 #include <vector>
 
 #include "ash/shell.h"
-#include "ash/wm/window_cycle_controller.h"
+#include "ash/wm/mru_window_tracker.h"
 #include "ash/wm/window_util.h"
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
 #include "base/json/json_writer.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "base/synchronization/cancellation_flag.h"
 #include "base/threading/sequenced_worker_pool.h"
@@ skipping 113 matching lines @@
   WindowStateManager() {}
 
   virtual ~WindowStateManager() {
     for (std::vector<aura::Window*>::iterator iter = windows_.begin();
          iter != windows_.end(); ++iter) {
       (*iter)->RemoveObserver(this);
     }
   }
 
   void BuildWindowListAndMinimizeInactive(aura::Window* active_window) {
-    windows_ = ash::WindowCycleController::BuildWindowList(NULL, false);
+    windows_ = ash::MruWindowTracker::BuildWindowList(false);
     // Remove active window.
     std::vector<aura::Window*>::iterator last =
         std::remove(windows_.begin(), windows_.end(), active_window);
     // Removes unfocusable windows.
     last =
         std::remove_if(
             windows_.begin(),
             last,
             std::ptr_fun(ash::wm::IsWindowMinimized));
     windows_.erase(last, windows_.end());
@@ skipping 756 matching lines @@
                  this, file_list));
 }
 
 void WallpaperPrivateGetOfflineWallpaperListFunction::OnComplete(
     const std::vector<std::string>& file_list) {
   ListValue* results = new ListValue();
   results->AppendStrings(file_list);
   SetResult(results);
   SendResponse(true);
 }