Remove window/host accessors from WED; IWYU for WTH

ui/aura/window_event_dispatcher.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 "ui/aura/window_event_dispatcher.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 281 matching lines @@
 
 void WindowEventDispatcher::OnCursorMovedToRootLocation(
     const gfx::Point& root_location) {
   SetLastMouseLocation(window(), root_location);
   synthesize_mouse_move_ = false;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // WindowEventDispatcher, private:
 
+Window* WindowEventDispatcher::window() {
+  return host_->window();
+}
+
+const Window* WindowEventDispatcher::window() const {
+  return host_->window();
+}
+
 void WindowEventDispatcher::TransformEventForDeviceScaleFactor(
     ui::LocatedEvent* event) {
-  event->UpdateForRootTransform(host()->GetInverseRootTransform());
+  event->UpdateForRootTransform(host_->GetInverseRootTransform());
 }
 
 ui::EventDispatchDetails WindowEventDispatcher::DispatchMouseEnterOrExit(
     const ui::MouseEvent& event,
     ui::EventType type) {
   if (event.type() != ui::ET_MOUSE_CAPTURE_CHANGED &&
       !(event.flags() & ui::EF_IS_SYNTHESIZED)) {
     SetLastMouseLocation(window(), event.root_location());
   }
 
@@ skipping 315 matching lines @@
 
 ui::EventDispatchDetails WindowEventDispatcher::SynthesizeMouseMoveEvent() {
   DispatchDetails details;
   if (!synthesize_mouse_move_)
     return details;
   synthesize_mouse_move_ = false;
   gfx::Point root_mouse_location = GetLastMouseLocationInRoot();
   if (!window()->bounds().Contains(root_mouse_location))
     return details;
   gfx::Point host_mouse_location = root_mouse_location;
-  host()->ConvertPointToHost(&host_mouse_location);
+  host_->ConvertPointToHost(&host_mouse_location);
   ui::MouseEvent event(ui::ET_MOUSE_MOVED,
                        host_mouse_location,
                        host_mouse_location,
                        ui::EF_IS_SYNTHESIZED,
                        0);
   return OnEventFromSource(&event);
 }
 
 void WindowEventDispatcher::PreDispatchLocatedEvent(Window* target,
                                                     ui::LocatedEvent* event) {
@@ skipping 138 matching lines @@
       break;
 
     default:
       NOTREACHED();
       break;
   }
   PreDispatchLocatedEvent(target, event);
 }
 
 }  // namespace aura