Revert 236048 "Rename RootWindowHost* to WindowTreeHost*"

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

Index: trunk/src/ui/views/widget/widget.h
===================================================================
--- trunk/src/ui/views/widget/widget.h	(revision 236092)
+++ trunk/src/ui/views/widget/widget.h	(working copy)
@@ -52,7 +52,7 @@
 
 namespace views {
 
-class DesktopWindowTreeHost;
+class DesktopRootWindowHost;
 class InputMethod;
 class NativeWidget;
 class NonClientFrameView;
@@ -207,11 +207,11 @@
     // When set, this value is used as the Widget's NativeWidget implementation.
     // The Widget will not construct a default one. Default is NULL.
     NativeWidget* native_widget;
-    // Aura-only. Provides a DesktopWindowTreeHost implementation to use instead
+    // Aura-only. Provides a DesktopRootWindowHost implementation to use instead
     // of the default one.
     // TODO(beng): Figure out if there's a better way to expose this, e.g. get
     // rid of NW subclasses and do this all via message handling.
-    DesktopWindowTreeHost* desktop_root_window_host;
+    DesktopRootWindowHost* desktop_root_window_host;
     // Whether this window is intended to be a toplevel window with no
     // attachment to any other window. (This may be a transient window if
     // |parent| is set.)