Move root_window_host* in aura to window_tree_host*.

ui/views/widget/desktop_aura/desktop_window_tree_host_win.h

Index: ui/views/widget/desktop_aura/desktop_window_tree_host_win.h
diff --git a/ui/views/widget/desktop_aura/desktop_root_window_host_win.h b/ui/views/widget/desktop_aura/desktop_window_tree_host_win.h
similarity index 98%
rename from ui/views/widget/desktop_aura/desktop_root_window_host_win.h
rename to ui/views/widget/desktop_aura/desktop_window_tree_host_win.h
index 4eb7b34caaa4f983b4d82b14482c6ed83449b100..ebb1836f4c98c7ba25106aa1381166a9d115f84c 100644
--- a/ui/views/widget/desktop_aura/desktop_root_window_host_win.h
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_win.h
@@ -2,13 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_ROOT_WINDOW_HOST_WIN_H_
-#define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_ROOT_WINDOW_HOST_WIN_H_
+#ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_WIN_H_
+#define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_WIN_H_
 
 #include "ui/aura/client/animation_host.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/views/views_export.h"
-#include "ui/views/widget/desktop_aura/desktop_root_window_host.h"
+#include "ui/views/widget/desktop_aura/desktop_window_tree_host.h"
 #include "ui/views/win/hwnd_message_handler_delegate.h"
 
 namespace aura {
@@ -287,4 +287,4 @@ class VIEWS_EXPORT DesktopWindowTreeHostWin
 
 }  // namespace views
 
-#endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_ROOT_WINDOW_HOST_WIN_H_
+#endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_WIN_H_