SetDeviceScaleFactorForTest

ui/display/mac/screen_mac.mm

 // Copyright (c) 2012 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 "ui/display/screen.h"
 
 #import <ApplicationServices/ApplicationServices.h>
 #import <Cocoa/Cocoa.h>
 #include <stdint.h>
 
@@ skipping 171 matching lines @@
   }
 
   void AddObserver(DisplayObserver* observer) override {
     change_notifier_.AddObserver(observer);
   }
 
   void RemoveObserver(DisplayObserver* observer) override {
     change_notifier_.RemoveObserver(observer);
   }
 
+  void SetDeviceScaleFactorForTest(float scale_factor) override {
+    display::Display::SetForceDeviceScaleFactorForTesting(scale_factor);
+    ConfigureTimerFired();
+  }
+
   static void DisplayReconfigurationCallBack(CGDirectDisplayID display,
                                              CGDisplayChangeSummaryFlags flags,
                                              void* userInfo) {
     if (flags & kCGDisplayBeginConfigurationFlag)
       return;
 
     static_cast<ScreenMac*>(userInfo)->HandleDisplayReconfiguration();
   }
 
   void HandleDisplayReconfiguration() {
@@ skipping 78 matching lines @@
 
 }  // namespace
 
 #if !defined(USE_AURA)
 Screen* CreateNativeScreen() {
   return new ScreenMac;
 }
 #endif
 
 }  // namespace display