Rename RootWindowHost* to WindowTreeHost*

ui/views/test/ui_controls_factory_desktop_aurax11.cc

Index: ui/views/test/ui_controls_factory_desktop_aurax11.cc
diff --git a/ui/views/test/ui_controls_factory_desktop_aurax11.cc b/ui/views/test/ui_controls_factory_desktop_aurax11.cc
index 5fd0e1e38794a5ffceac5fee6559d2e9e247de81..6db2e4a4c63bb955080348268bea9899b7db495d 100644
--- a/ui/views/test/ui_controls_factory_desktop_aurax11.cc
+++ b/ui/views/test/ui_controls_factory_desktop_aurax11.cc
@@ -259,10 +259,10 @@ class UIControlsDesktopX11 : public UIControlsAura {
     // Most interactive_ui_tests run inside of the aura_test_helper
     // environment. This means that we can't rely on gfx::Screen and several
     // other things to work properly. Therefore we hack around this by
-    // iterating across the windows owned DesktopRootWindowHostX11 since this
+    // iterating across the windows owned DesktopWindowTreeHostX11 since this
     // doesn't rely on having a DesktopScreenX11.
     std::vector<aura::Window*> windows =
-        DesktopRootWindowHostX11::GetAllOpenWindows();
+        DesktopWindowTreeHostX11::GetAllOpenWindows();
     for (std::vector<aura::Window*>::const_iterator it = windows.begin();
          it != windows.end(); ++it) {
       if ((*it)->GetBoundsInScreen().Contains(point)) {