Use platform's device scale factor for cursor

ash/display/display_controller_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 "ash/display/display_controller.h"
 
 #include "ash/ash_switches.h"
 #include "ash/display/display_info.h"
 #include "ash/display/display_layout_store.h"
 #include "ash/display/display_manager.h"
@@ skipping 917 matching lines @@
       display_controller->GetRootWindowForDisplayId(primary_display.id());
   aura::Window* secondary_root =
       display_controller->GetRootWindowForDisplayId(secondary_display.id());
   EXPECT_NE(primary_root, secondary_root);
 
   test::CursorManagerTestApi test_api(Shell::GetInstance()->cursor_manager());
 
   EXPECT_EQ(1.0f, primary_root->GetHost()->compositor()->
       device_scale_factor());
   primary_root->MoveCursorTo(gfx::Point(50, 50));
-  EXPECT_EQ(1.0f, test_api.GetDisplay().device_scale_factor());
+  EXPECT_EQ(1.0f, test_api.GetCurrentCursor().device_scale_factor());
   EXPECT_EQ(2.0f, secondary_root->GetHost()->compositor()->
       device_scale_factor());
   secondary_root->MoveCursorTo(gfx::Point(50, 50));
-  EXPECT_EQ(2.0f, test_api.GetDisplay().device_scale_factor());
+  EXPECT_EQ(2.0f, test_api.GetCurrentCursor().device_scale_factor());
 
   // Switch primary and secondary
   display_controller->SetPrimaryDisplay(secondary_display);
 
   // Cursor's device scale factor should be updated accroding to the swap of
   // primary and secondary.
   EXPECT_EQ(1.0f, secondary_root->GetHost()->compositor()->
       device_scale_factor());
   secondary_root->MoveCursorTo(gfx::Point(50, 50));
-  EXPECT_EQ(1.0f, test_api.GetDisplay().device_scale_factor());
+  EXPECT_EQ(1.0f, test_api.GetCurrentCursor().device_scale_factor());
   primary_root->MoveCursorTo(gfx::Point(50, 50));
   EXPECT_EQ(2.0f, primary_root->GetHost()->compositor()->
       device_scale_factor());
-  EXPECT_EQ(2.0f, test_api.GetDisplay().device_scale_factor());
+  EXPECT_EQ(2.0f, test_api.GetCurrentCursor().device_scale_factor());
 
   // Deleting 2nd display.
   UpdateDisplay("200x200");
   RunAllPendingInMessageLoop();  // RootWindow is deleted in a posted task.
 
   // Cursor's device scale factor should be updated even without moving cursor.
-  EXPECT_EQ(1.0f, test_api.GetDisplay().device_scale_factor());
+  EXPECT_EQ(1.0f, test_api.GetCurrentCursor().device_scale_factor());
 
   primary_root->MoveCursorTo(gfx::Point(50, 50));
   EXPECT_EQ(1.0f, primary_root->GetHost()->compositor()->
       device_scale_factor());
-  EXPECT_EQ(1.0f, test_api.GetDisplay().device_scale_factor());
+  EXPECT_EQ(1.0f, test_api.GetCurrentCursor().device_scale_factor());
 }
 
 TEST_F(DisplayControllerTest, OverscanInsets) {
   if (!SupportsMultipleDisplays())
     return;
 
   DisplayController* display_controller =
       Shell::GetInstance()->display_controller();
   TestEventHandler event_handler;
   Shell::GetInstance()->AddPreTargetHandler(&event_handler);
@@ skipping 314 matching lines @@
   EXPECT_EQ("aura_root_x", GetXWindowName(secondary->GetHost()));
 
   // Switching back to single display.
   UpdateDisplay("300x400");
   EXPECT_EQ("aura_root_0", GetXWindowName(
       Shell::GetPrimaryRootWindow()->GetHost()));
 }
 #endif
 
 }  // namespace ash