Refactor TransformPoint{,Reverse}.

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 873 matching lines @@
             ScreenAsh::GetSecondaryDisplay().bounds().ToString());
 
   generator.MoveMouseToInHost(30, 20);
   EXPECT_EQ("30,20", event_handler.GetLocationAndReset());
 
   // Make sure the root window transformer uses correct scale
   // factor when swapping display. Test crbug.com/253690.
   UpdateDisplay("400x300*2,600x400/o");
   root_windows = Shell::GetAllRootWindows();
   gfx::Point point;
-  Shell::GetAllRootWindows()[1]->GetRootTransform().TransformPoint(point);
+  Shell::GetAllRootWindows()[1]->GetRootTransform().TransformPoint(&point);
   EXPECT_EQ("15,10", point.ToString());
 
   display_controller->SwapPrimaryDisplay();
   point.SetPoint(0, 0);
-  Shell::GetAllRootWindows()[1]->GetRootTransform().TransformPoint(point);
+  Shell::GetAllRootWindows()[1]->GetRootTransform().TransformPoint(&point);
   EXPECT_EQ("15,10", point.ToString());
 
   Shell::GetInstance()->RemovePreTargetHandler(&event_handler);
 }
 
 TEST_F(DisplayControllerTest, Rotate) {
   if (!SupportsMultipleDisplays())
     return;
 
   DisplayController* display_controller =
@@ skipping 213 matching lines @@
   EXPECT_EQ("aura_root_0", GetXWindowName(primary));
   EXPECT_EQ("aura_root_x", GetXWindowName(secondary));
 
   // Switching back to single display.
   UpdateDisplay("300x400");
   EXPECT_EQ("aura_root_0", GetXWindowName(Shell::GetPrimaryRootWindow()));
 }
 #endif
 
 }  // namespace ash