Remove old activation code and disable-focus-controller flags

ash/wm/mru_window_tracker.cc

 // Copyright 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 "ash/wm/mru_window_tracker.h"
 
 #include <algorithm>
 
 #include "ash/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
-#include "ash/wm/activation_controller.h"
 #include "ash/wm/window_cycle_list.h"
 #include "ash/wm/window_util.h"
 #include "ash/wm/workspace_controller.h"
+#include "ui/aura/client/activation_client.h"
 #include "ui/aura/root_window.h"
 #include "ui/base/events/event.h"
 #include "ui/base/events/event_handler.h"
 
 namespace ash {
 
 namespace {
 
 // Adds the windows that can be cycled through for the specified window id to
 // |windows|.
@@ skipping 150 matching lines @@
 
 void MruWindowTracker::OnWillRemoveWindow(aura::Window* window) {
   mru_windows_.remove(window);
 }
 
 void MruWindowTracker::OnWindowDestroying(aura::Window* window) {
   window->RemoveObserver(this);
 }
 
 }  // namespace ash