Move root_window_host* in aura to window_tree_host*.

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h

Index: ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
diff --git a/ui/views/widget/desktop_aura/desktop_root_window_host_x11.h b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
similarity index 97%
rename from ui/views/widget/desktop_aura/desktop_root_window_host_x11.h
rename to ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
index c7184b2642fe9cd6c6b9b75603f01fc2f0c30f82..80d03070ffc504fd33c17579878571c34ae823cb 100644
--- a/ui/views/widget/desktop_aura/desktop_root_window_host_x11.h
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
@@ -2,8 +2,8 @@
 // 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_X11_H_
-#define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_ROOT_WINDOW_HOST_X11_H_
+#ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_X11_H_
+#define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_X11_H_
 
 #include <X11/extensions/shape.h>
 #include <X11/Xlib.h>
@@ -19,7 +19,7 @@
 #include "ui/gfx/rect.h"
 #include "ui/gfx/x/x11_atom_cache.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"
 
 namespace gfx {
 class ImageSkia;
@@ -305,4 +305,4 @@ private:
 
 }  // namespace views
 
-#endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_ROOT_WINDOW_HOST_X11_H_
+#endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_X11_H_