SetDeviceScaleFactorForTest

ash/display/screen_ash.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/display/screen_ash.h"
 
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/wm/root_window_finder.h"
 #include "ash/display/display_manager.h"
 #include "ash/display/window_tree_host_manager.h"
@@ skipping 169 matching lines @@
 }
 
 void ScreenAsh::AddObserver(display::DisplayObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void ScreenAsh::RemoveObserver(display::DisplayObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
+void ScreenAsh::SetDeviceScaleFactorForTest(float scale_factor) {
+  display::Display::SetForceDeviceScaleFactorForTesting(scale_factor);
+  GetDisplayManager()->UpdateDisplays();
+}
+
 display::Screen* ScreenAsh::CloneForShutdown() {
   return new ScreenForShutdown(this);
 }
 
 }  // namespace ash