Enable display rotation, magnifier in unified desktop mode

ash/host/ash_window_tree_host_ozone.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.h"
 
 #include "ash/host/ash_window_tree_host_init_params.h"
 #include "ash/host/ash_window_tree_host_unified.h"
 #include "ash/host/root_window_transformer.h"
 #include "ash/host/transformer_helper.h"
@@ skipping 38 matching lines @@
   // Temporarily disable the tap-to-click feature. Used on CrOS.
   void SetTapToClickPaused(bool state);
 
   TransformerHelper transformer_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(AshWindowTreeHostOzone);
 };
 
 AshWindowTreeHostOzone::AshWindowTreeHostOzone(const gfx::Rect& initial_bounds)
     : aura::WindowTreeHostOzone(initial_bounds), transformer_helper_(this) {
+  transformer_helper_.Init();
 }
 
 AshWindowTreeHostOzone::~AshWindowTreeHostOzone() {
 }
 
 void AshWindowTreeHostOzone::ToggleFullScreen() {
   NOTIMPLEMENTED();
 }
 
 bool AshWindowTreeHostOzone::ConfineCursorToRootWindow() {
@@ skipping 75 matching lines @@
 }  // namespace
 
 AshWindowTreeHost* AshWindowTreeHost::Create(
     const AshWindowTreeHostInitParams& init_params) {
   if (init_params.offscreen)
     return new AshWindowTreeHostUnified(init_params.initial_bounds);
   return new AshWindowTreeHostOzone(init_params.initial_bounds);
 }
 
 }  // namespace ash