Rename RootWindowHost* to WindowTreeHost*

chrome/browser/ui/aura/active_desktop_monitor.cc

Index: chrome/browser/ui/aura/active_desktop_monitor.cc
diff --git a/chrome/browser/ui/aura/active_desktop_monitor.cc b/chrome/browser/ui/aura/active_desktop_monitor.cc
index 736d84892154bca547b5d996749897ae358aa4d8..32ac37196390613b7a1a2f4a11a9d7b2201f816e 100644
--- a/chrome/browser/ui/aura/active_desktop_monitor.cc
+++ b/chrome/browser/ui/aura/active_desktop_monitor.cc
@@ -39,14 +39,14 @@ chrome::HostDesktopType ActiveDesktopMonitor::GetLastActivatedDesktopType() {
 
 // static
 bool ActiveDesktopMonitor::IsDesktopWindow(aura::RootWindow* root_window) {
-  // Only windows hosted by a DesktopRootWindowHost implementation can be mapped
+  // Only windows hosted by a DesktopWindowTreeHost implementation can be mapped
   // back to a content Window. All others, therefore, must be the root window
   // for an Ash display.
 #if defined(OS_WIN)
-  return views::DesktopRootWindowHostWin::GetContentWindowForHWND(
+  return views::DesktopWindowTreeHostWin::GetContentWindowForHWND(
       root_window->host()->GetAcceleratedWidget()) != NULL;
 #elif defined(USE_X11)
-  return views::DesktopRootWindowHostX11::GetContentWindowForXID(
+  return views::DesktopWindowTreeHostX11::GetContentWindowForXID(
       root_window->host()->GetAcceleratedWidget()) != NULL;
 #else
   NOTREACHED();