Specify a default display UI scale to reset the zoom to

chrome/browser/chromeos/display/display_preferences_unittest.cc

 // 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 "chrome/browser/chromeos/display/display_preferences.h"
 
 #include <stdint.h>
 
 #include <string>
 #include <utility>
@@ skipping 282 matching lines @@
   display::DisplayIdList list = ash::test::CreateDisplayIdList2(id1, dummy_id);
   StoreDisplayLayoutPrefForTest(list, *dummy_layout);
 
   // Can't switch to a display that does not exist.
   window_tree_host_manager->SetPrimaryDisplayId(dummy_id);
   EXPECT_NE(dummy_id, display::Screen::GetScreen()->GetPrimaryDisplay().id());
 
   window_tree_host_manager->SetOverscanInsets(id1, gfx::Insets(10, 11, 12, 13));
   display_manager()->SetDisplayRotation(id1, display::Display::ROTATE_90,
                                         display::Display::ROTATION_SOURCE_USER);
-  EXPECT_TRUE(display_manager()->SetDisplayUIScale(id1, 1.25f));
-  EXPECT_FALSE(display_manager()->SetDisplayUIScale(id2, 1.25f));
+  EXPECT_TRUE(ash::test::DisplayManagerTestApi(display_manager())
+                  .SetDisplayUIScale(id1, 1.25f));
+  EXPECT_FALSE(ash::test::DisplayManagerTestApi(display_manager())
+                   .SetDisplayUIScale(id2, 1.25f));
 
   const base::DictionaryValue* displays =
       local_state()->GetDictionary(prefs::kSecondaryDisplays);
   const base::DictionaryValue* layout_value = nullptr;
   std::string key = base::Int64ToString(id1) + "," + base::Int64ToString(id2);
   std::string dummy_key =
       base::Int64ToString(id1) + "," + base::Int64ToString(dummy_id);
   EXPECT_TRUE(displays->GetDictionary(dummy_key, &layout_value));
 
   display::DisplayLayout stored_layout;
@@ skipping 356 matching lines @@
 
   UpdateDisplay("200x200*2,200x200");
 
   LoggedInAsGuest();
   int64_t id1 = display::Screen::GetScreen()->GetPrimaryDisplay().id();
   ash::test::ScopedSetInternalDisplayId set_internal(
       ash::Shell::GetInstance()->display_manager(), id1);
   int64_t id2 = display_manager()->GetSecondaryDisplay().id();
   display_manager()->SetLayoutForCurrentDisplays(ash::test::CreateDisplayLayout(
       display_manager(), display::DisplayPlacement::TOP, 10));
-  display_manager()->SetDisplayUIScale(id1, 1.25f);
+  ash::test::DisplayManagerTestApi(display_manager())
+      .SetDisplayUIScale(id1, 1.25f);
   window_tree_host_manager->SetPrimaryDisplayId(id2);
   int64_t new_primary = display::Screen::GetScreen()->GetPrimaryDisplay().id();
   window_tree_host_manager->SetOverscanInsets(new_primary,
                                               gfx::Insets(10, 11, 12, 13));
   display_manager()->SetDisplayRotation(new_primary,
                                         display::Display::ROTATE_90,
                                         display::Display::ROTATION_SOURCE_USER);
 
   // Does not store the preferences locally.
   EXPECT_FALSE(local_state()->FindPreference(
@@ skipping 417 matching lines @@
 
   EXPECT_EQ(gfx::Rect(0, 0, 200, 200),
             display_manager()->GetDisplayForId(list[0]).bounds());
   EXPECT_EQ(gfx::Rect(-200, 0, 200, 200),
             display_manager()->GetDisplayForId(list[1]).bounds());
   EXPECT_EQ(gfx::Rect(-100, 200, 300, 300),
             display_manager()->GetDisplayForId(list[2]).bounds());
 }
 
 }  // namespace chromeos