Remove window/host accessors from WED; IWYU for WTH

ash/autoclick/autoclick_controller.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/autoclick/autoclick_controller.h"
 
 #include "ash/shell.h"
 #include "ash/wm/coordinate_conversion.h"
 #include "base/timer/timer.h"
 #include "ui/aura/env.h"
-#include "ui/aura/window_event_dispatcher.h"
+#include "ui/aura/window_tree_host.h"
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/event_handler.h"
+#include "ui/events/event_processor.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/vector2d.h"
 
 namespace ash {
 
 namespace {
 
 // The threshold of mouse movement measured in DIP that will
 // initiate a new autoclick.
 const int kMovementThreshold = 20;
@@ skipping 169 matching lines @@
                              click_location,
                              mouse_event_flags_ | ui::EF_LEFT_MOUSE_BUTTON,
                              ui::EF_LEFT_MOUSE_BUTTON);
   ui::MouseEvent release_event(ui::ET_MOUSE_RELEASED,
                                click_location,
                                click_location,
                                mouse_event_flags_ | ui::EF_LEFT_MOUSE_BUTTON,
                                ui::EF_LEFT_MOUSE_BUTTON);
 
   ui::EventDispatchDetails details =
-      host->dispatcher()->OnEventFromSource(&press_event);
+      host->event_processor()->OnEventFromSource(&press_event);
   if (!details.dispatcher_destroyed)
-    details = host->dispatcher()->OnEventFromSource(&release_event);
+    details = host->event_processor()->OnEventFromSource(&release_event);
   if (details.dispatcher_destroyed)
     return;
 }
 
 // static.
 AutoclickController* AutoclickController::CreateInstance() {
   return new AutoclickControllerImpl();
 }
 
 }  // namespace ash