Rename RootWindowHost* to WindowTreeHost*

ui/views/widget/desktop_aura/x11_desktop_window_move_client.cc

Index: ui/views/widget/desktop_aura/x11_desktop_window_move_client.cc
diff --git a/ui/views/widget/desktop_aura/x11_desktop_window_move_client.cc b/ui/views/widget/desktop_aura/x11_desktop_window_move_client.cc
index a79d365ebc7b8351063ae391989b41055cca0fa6..0e815283847f3b46a747f2a1f617bf7d911fde2a 100644
--- a/ui/views/widget/desktop_aura/x11_desktop_window_move_client.cc
+++ b/ui/views/widget/desktop_aura/x11_desktop_window_move_client.cc
@@ -71,7 +71,7 @@ void X11DesktopWindowMoveClient::OnMoveLoopEnded() {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// DesktopRootWindowHostLinux, aura::client::WindowMoveClient implementation:
+// DesktopWindowTreeHostLinux, aura::client::WindowMoveClient implementation:
 
 aura::client::WindowMoveResult X11DesktopWindowMoveClient::RunMoveLoop(
     aura::Window* source,
@@ -90,7 +90,7 @@ void X11DesktopWindowMoveClient::EndMoveLoop() {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// DesktopRootWindowHostLinux, private:
+// DesktopWindowTreeHostLinux, private:
 
 void X11DesktopWindowMoveClient::SetHostBounds(const gfx::Rect& rect) {
   root_window_->SetHostBounds(rect);