Provide access to the WindowEventDispatcher as a ui::EventProcessor.

ui/aura/window_tree_host.h

 // Copyright (c) 2012 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_TREE_HOST_H_
 #define UI_AURA_WINDOW_TREE_HOST_H_
 
 #include <vector>
 
 #include "base/event_types.h"
 #include "base/message_loop/message_loop.h"
 #include "ui/aura/aura_export.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace gfx {
 class Insets;
 class Point;
 class Rect;
 class Size;
 class Transform;
 }
 
 namespace ui {
 class Compositor;
+class EventProcessor;
 class ViewProp;
 }
 
 namespace aura {
 class RootWindowTransformer;
 class WindowEventDispatcher;
 class WindowTreeHostObserver;
 
 // WindowTreeHost bridges between a native window and the embedded RootWindow.
 // It provides the accelerated widget and maps events from the native os to
 // aura.
 class AURA_EXPORT WindowTreeHost {
  public:
   virtual ~WindowTreeHost();
 
   // Creates a new WindowTreeHost. The caller owns the returned value.
   static WindowTreeHost* Create(const gfx::Rect& bounds);
 
   // Returns the WindowTreeHost for the specified accelerated widget, or NULL
   // if there is none associated.
   static WindowTreeHost* GetForAcceleratedWidget(gfx::AcceleratedWidget widget);
 
   void InitHost();
 
   void InitCompositor();
 
+  void AddObserver(WindowTreeHostObserver* observer);
+  void RemoveObserver(WindowTreeHostObserver* observer);
+
   Window* window() { return window_; }
   const Window* window() const { return window_; }
 
-  void AddObserver(WindowTreeHostObserver* observer);
-  void RemoveObserver(WindowTreeHostObserver* observer);
+  ui::EventProcessor* event_processor();
 
   WindowEventDispatcher* dispatcher() {
     return const_cast<WindowEventDispatcher*>(
         const_cast<const WindowTreeHost*>(this)->dispatcher());
   }
   const WindowEventDispatcher* dispatcher() const { return dispatcher_.get(); }
 
   ui::Compositor* compositor() { return compositor_.get(); }
 
   void SetRootWindowTransformer(scoped_ptr<RootWindowTransformer> transformer);
@@ skipping 147 matching lines @@
   gfx::NativeCursor last_cursor_;
 
   scoped_ptr<ui::ViewProp> prop_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeHost);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_TREE_HOST_H_