Rename RootWindowHost* to WindowTreeHost*

ui/aura/window_tree_host_delegate.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_ROOT_WINDOW_HOST_DELEGATE_H_
 #define UI_AURA_ROOT_WINDOW_HOST_DELEGATE_H_
 
 #include "ui/aura/aura_export.h"
 
 namespace gfx {
 class Point;
 class Rect;
 class Size;
 }
 
 namespace ui {
 class Event;
 class EventProcessor;
 class KeyEvent;
 class MouseEvent;
 class ScrollEvent;
 class TouchEvent;
 }
 
 namespace aura {
 
 class RootWindow;
 
-// A private interface used by RootWindowHost implementations to communicate
+// A private interface used by WindowTreeHost implementations to communicate
 // with their owning RootWindow.
-class AURA_EXPORT RootWindowHostDelegate {
+class AURA_EXPORT WindowTreeHostDelegate {
  public:
   virtual bool OnHostKeyEvent(ui::KeyEvent* event) = 0;
   virtual bool OnHostMouseEvent(ui::MouseEvent* event) = 0;
   virtual bool OnHostScrollEvent(ui::ScrollEvent* event) = 0;
   virtual bool OnHostTouchEvent(ui::TouchEvent* event) = 0;
   virtual void OnHostCancelMode() = 0;
 
   // Called when the windowing system activates the window.
   virtual void OnHostActivated() = 0;
 
   // Called when system focus is changed to another window.
   virtual void OnHostLostWindowCapture() = 0;
 
   // Called when the windowing system has mouse grab because it's performing a
   // window move on our behalf, but we should still paint as if we're active.
   virtual void OnHostLostMouseGrab() = 0;
 
   virtual void OnHostMoved(const gfx::Point& origin) = 0;
   virtual void OnHostResized(const gfx::Size& size) = 0;
 
   virtual RootWindow* AsRootWindow() = 0;
   virtual const RootWindow* AsRootWindow() const = 0;
 
   virtual ui::EventProcessor* GetEventProcessor() = 0;
 
  protected:
-  virtual ~RootWindowHostDelegate() {}
+  virtual ~WindowTreeHostDelegate() {}
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_HOST_DELEGATE_H_