Revert 236048 "Rename RootWindowHost* to WindowTreeHost*"

trunk/src/ui/views/widget/desktop_aura/desktop_factory_ozone.h

Index: trunk/src/ui/views/widget/desktop_aura/desktop_factory_ozone.h
===================================================================
--- trunk/src/ui/views/widget/desktop_aura/desktop_factory_ozone.h	(revision 236092)
+++ trunk/src/ui/views/widget/desktop_aura/desktop_factory_ozone.h	(working copy)
@@ -13,7 +13,7 @@
 
 namespace views {
 class DesktopNativeWidgetAura;
-class DesktopWindowTreeHost;
+class DesktopRootWindowHost;
 
 namespace internal {
 class NativeWidgetDelegate;
@@ -30,9 +30,9 @@
   // Sets the implementation delegate. Ownership is retained by the caller.
   static void SetInstance(DesktopFactoryOzone* impl);
 
-  // Delegates implementation of DesktopWindowTreeHost::Create externally to
+  // Delegates implementation of DesktopRootWindowHost::Create externally to
   // Ozone implementation.
-  virtual DesktopWindowTreeHost* CreateWindowTreeHost(
+  virtual DesktopRootWindowHost* CreateRootWindowHost(
       internal::NativeWidgetDelegate* native_widget_delegate,
       DesktopNativeWidgetAura* desktop_native_widget_aura) = 0;