Enable display rotation, magnifier in unified desktop mode

ash/host/ash_window_tree_host_x11.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/host/ash_window_tree_host_x11.h"
 
 #include <X11/extensions/Xfixes.h>
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
@@ skipping 17 matching lines @@
 #include "ui/events/event_utils.h"
 #include "ui/events/null_event_targeter.h"
 #include "ui/events/platform/platform_event_source.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/screen.h"
 
 namespace ash {
 
 AshWindowTreeHostX11::AshWindowTreeHostX11(const gfx::Rect& initial_bounds)
     : WindowTreeHostX11(initial_bounds), transformer_helper_(this) {
+  transformer_helper_.Init();
   aura::Env::GetInstance()->AddObserver(this);
 }
 
 AshWindowTreeHostX11::~AshWindowTreeHostX11() {
   aura::Env::GetInstance()->RemoveObserver(this);
   UnConfineCursor();
 }
 
 void AshWindowTreeHostX11::ToggleFullScreen() { NOTIMPLEMENTED(); }
 
@@ skipping 232 matching lines @@
 #endif
 
 AshWindowTreeHost* AshWindowTreeHost::Create(
     const AshWindowTreeHostInitParams& init_params) {
   if (init_params.offscreen)
     return new AshWindowTreeHostUnified(init_params.initial_bounds);
   return new AshWindowTreeHostX11(init_params.initial_bounds);
 }
 
 }  // namespace ash