Remove window/host accessors from WED; IWYU for WTH

ui/aura/window_event_dispatcher.h

 // 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.
 
 #ifndef UI_AURA_WINDOW_EVENT_DISPATCHER_H_
 #define UI_AURA_WINDOW_EVENT_DISPATCHER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "ui/aura/aura_export.h"
 #include "ui/aura/client/capture_delegate.h"
-#include "ui/aura/window_tree_host.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/event_processor.h"
 #include "ui/events/event_targeter.h"
 #include "ui/events/gestures/gesture_recognizer.h"
 #include "ui/events/gestures/gesture_types.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/point.h"
 
 namespace gfx {
 class Size;
 class Transform;
 }
 
 namespace ui {
 class GestureEvent;
 class GestureRecognizer;
 class KeyEvent;
 class MouseEvent;
 class ScrollEvent;
 class TouchEvent;
 }
 
 namespace aura {
 class RootWindowObserver;
 class TestScreen;
 class WindowTargeter;
+class WindowTreeHost;
 
 // WindowEventDispatcher orchestrates event dispatch within a window tree
 // owned by WindowTreeHost. WTH also owns the WED.
 // TODO(beng): In progress, remove functionality not directly related to
 //             event dispatch.
 class AURA_EXPORT WindowEventDispatcher : public ui::EventProcessor,
                                           public ui::GestureEventHelper,
                                           public client::CaptureDelegate {
  public:
   explicit WindowEventDispatcher(WindowTreeHost* host);
   virtual ~WindowEventDispatcher();
 
-  Window* window() { return host()->window(); }
-  const Window* window() const { return host()->window(); }
-  WindowTreeHost* host() {
-    return const_cast<WindowTreeHost*>(
-        const_cast<const WindowEventDispatcher*>(this)->host());
-  }
-  const WindowTreeHost* host() const { return host_; }
   Window* mouse_pressed_handler() { return mouse_pressed_handler_; }
   Window* mouse_moved_handler() { return mouse_moved_handler_; }
 
   // Repost event for re-processing. Used when exiting context menus.
   // We only support the ET_MOUSE_PRESSED and ET_GESTURE_TAP_DOWN event
   // types (although the latter is currently a no-op).
   void RepostEvent(const ui::LocatedEvent& event);
 
   // Invoked when the mouse events get enabled or disabled.
   void OnMouseEventsEnableStateChanged(bool enabled);
@@ skipping 68 matching lines @@
   friend class TestScreen;
 
   // The parameter for OnWindowHidden() to specify why window is hidden.
   enum WindowHiddenReason {
     WINDOW_DESTROYED,  // Window is destroyed.
     WINDOW_HIDDEN,     // Window is hidden.
     WINDOW_MOVING,     // Window is temporarily marked as hidden due to move
                        // across root windows.
   };
 
+  Window* window();
+  const Window* window() const;
+
   // Updates the event with the appropriate transform for the device scale
   // factor. The WindowEventDispatcher dispatches events in the physical pixel
   // coordinate. But the event processing from WindowEventDispatcher onwards
   // happen in device-independent pixel coordinate. So it is necessary to update
   // the event received from the host.
   void TransformEventForDeviceScaleFactor(ui::LocatedEvent* event);
 
   // Dispatches the specified event type (intended for enter/exit) to the
   // |mouse_moved_handler_|.
   ui::EventDispatchDetails DispatchMouseEnterOrExit(
@@ skipping 92 matching lines @@
 
   // Used to schedule DispatchHeldEvents() when |move_hold_count_| goes to 0.
   base::WeakPtrFactory<WindowEventDispatcher> held_event_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowEventDispatcher);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_EVENT_DISPATCHER_H_