Converts MruWindowTracker to work with common types

ash/wm/maximize_mode/maximize_mode_window_manager.cc

 // Copyright 2014 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/wm/maximize_mode/maximize_mode_window_manager.h"
 
 #include "ash/ash_switches.h"
+#include "ash/aura/wm_window_aura.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm/wm_event.h"
 #include "ash/root_window_controller.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/wm/maximize_mode/maximize_mode_window_state.h"
 #include "ash/wm/maximize_mode/workspace_backdrop_delegate.h"
 #include "ash/wm/mru_window_tracker.h"
 #include "ash/wm/overview/window_selector_controller.h"
@@ skipping 198 matching lines @@
   EnableBackdropBehindTopWindowOnEachDisplay(true);
   display::Screen::GetScreen()->AddObserver(this);
   Shell::GetInstance()->AddShellObserver(this);
   Shell::GetInstance()->AddPreTargetHandler(this);
 }
 
 void MaximizeModeWindowManager::MaximizeAllWindows() {
   MruWindowTracker::WindowList windows = ash::Shell::GetInstance()->
       mru_window_tracker()->BuildWindowListIgnoreModal();
   // Add all existing Mru windows.
-  for (MruWindowTracker::WindowList::iterator window = windows.begin();
-      window != windows.end(); ++window) {
-    MaximizeAndTrackWindow(*window);
-  }
+  for (WmWindow* window : windows)
+    MaximizeAndTrackWindow(WmWindowAura::GetAuraWindow(window));
 }
 
 void MaximizeModeWindowManager::RestoreAllWindows() {
   while (window_state_map_.size())
     ForgetWindow(window_state_map_.begin()->first);
 }
 
 void MaximizeModeWindowManager::SetDeferBoundsUpdates(
     bool defer_bounds_updates) {
   for (WindowToState::iterator it = window_state_map_.begin();
@@ skipping 103 matching lines @@
     RootWindowController* controller = *iter;
     aura::Window* container = Shell::GetContainer(
         controller->GetRootWindow(), kShellWindowId_DefaultContainer);
     controller->workspace_controller()->SetMaximizeBackdropDelegate(
         std::unique_ptr<WorkspaceLayoutManagerBackdropDelegate>(
             enable ? new WorkspaceBackdropDelegate(container) : NULL));
   }
 }
 
 }  // namespace ash