Early return in UpdateTouchTransformer for software mirroring mode

ash/touch/touch_transformer_controller.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/touch/touch_transformer_controller.h"
 
 #include "ash/display/display_controller.h"
 #include "ash/display/display_manager.h"
 #include "ash/host/ash_window_tree_host.h"
 #include "ash/root_window_controller.h"
@@ skipping 164 matching lines @@
         display1.touch_device_id(),
         GetMirrorModeTouchTransformer(display1));
     device_manager->UpdateTouchInfoForDisplay(
         display2_id,
         display2.touch_device_id(),
         GetMirrorModeTouchTransformer(display2));
     return;
   }
 
   if (display_state == ui::MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED) {
+    // TODO(miletus) : Handle the case the state is DUAL_EXTENDED but it
+    // is actually doing software mirroring.
+    if (GetDisplayManager()->software_mirroring_enabled())
+      return;
     // In extended mode, each display is associated with one root window.
     aura::Window* root1 =
         display_controller->GetRootWindowForDisplayId(display1_id);
     aura::Window* root2 =
         display_controller->GetRootWindowForDisplayId(display2_id);
     RootWindowController::ForWindow(root1)->ash_host()->UpdateDisplayID(
         display1_id, gfx::Display::kInvalidDisplayID);
     RootWindowController::ForWindow(root2)->ash_host()->UpdateDisplayID(
         display2_id, gfx::Display::kInvalidDisplayID);
     gfx::Size fb_size =
@@ skipping 21 matching lines @@
 
 void TouchTransformerController::OnDisplaysInitialized() {
   UpdateTouchTransformer();
 }
 
 void TouchTransformerController::OnDisplayConfigurationChanged() {
   UpdateTouchTransformer();
 }
 
 }  // namespace ash