SetDeviceScaleFactorForTest

ui/aura/test/aura_test_helper.h

 // 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.
 
 #ifndef UI_AURA_TEST_AURA_TEST_HELPER_H_
 #define UI_AURA_TEST_AURA_TEST_HELPER_H_
 
 #include <memory>
 
 #include "base/macros.h"
+#include "ui/aura/test/test_screen.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_tree_host.h"
 
 namespace aura {
 class Env;
 }
 
 namespace base {
 class MessageLoopForUI;
 }
@@ skipping 24 matching lines @@
   // Creates and initializes (shows and sizes) the RootWindow for use in tests.
   void SetUp(ui::ContextFactory* context_factory);
 
   // Clean up objects that are created for tests. This also deletes the Env
   // object.
   void TearDown();
 
   // Flushes message loop.
   void RunAllPendingInMessageLoop();
 
-  Window* root_window() { return host_->window(); }
-  ui::EventProcessor* event_processor() { return host_->event_processor(); }
-  WindowTreeHost* host() { return host_.get(); }
+  Window* root_window() { return host()->window(); }
+  ui::EventProcessor* event_processor() { return host()->event_processor(); }
+  WindowTreeHost* host() { return test_screen_->host(); }
 
   TestScreen* test_screen() { return test_screen_.get(); }
 
  private:
   base::MessageLoopForUI* message_loop_;
   bool setup_called_;
   bool teardown_called_;
   std::unique_ptr<aura::Env> env_;
   std::unique_ptr<WindowTreeHost> host_;
   std::unique_ptr<TestWindowTreeClient> stacking_client_;
   std::unique_ptr<client::DefaultCaptureClient> capture_client_;
   std::unique_ptr<client::FocusClient> focus_client_;
   std::unique_ptr<TestScreen> test_screen_;
   std::unique_ptr<ui::ScopedAnimationDurationScaleMode> zero_duration_mode_;
 
   DISALLOW_COPY_AND_ASSIGN(AuraTestHelper);
 };
 
 }  // namespace test
 }  // namespace aura
 
 #endif  // UI_AURA_TEST_AURA_TEST_HELPER_H_