Early return in UpdateTouchTransformer for software mirroring mode

ash/touch/touch_transformer_controller.cc

Index: ash/touch/touch_transformer_controller.cc
diff --git a/ash/touch/touch_transformer_controller.cc b/ash/touch/touch_transformer_controller.cc
index 87954a3afbe3e005573724b584b6ecd513b17888..117c0a784155c2ed13dad6261ea02a79bc95810a 100644
--- a/ash/touch/touch_transformer_controller.cc
+++ b/ash/touch/touch_transformer_controller.cc
@@ -182,6 +182,10 @@ void TouchTransformerController::UpdateTouchTransformer() const {
   }
 
   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);