cros: Remove some OS platform ifdefs from ash

ash/drag_drop/drag_drop_interactive_uitest.cc

 // Copyright (c) 2013 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/drag_drop/drag_drop_controller.h"
 
 #include "ash/shell.h"
 #include "ash/test/ash_interactive_ui_test_base.h"
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 95 matching lines @@
 void DragDropAcrossMultiDisplay_Step1() {
   ui_controls::SendMouseEventsNotifyWhenDone(
       ui_controls::LEFT, ui_controls::DOWN,
       base::Bind(&DragDropAcrossMultiDisplay_Step2));
 }
 
 }  // namespace
 
 using DragDropTest = test::AshInteractiveUITestBase;
 
-#if !defined(OS_CHROMEOS)
-#define MAYBE_DragDropAcrossMultiDisplay DISABLED_DragDropAcrossMultiDisplay
-#else
-#define MAYBE_DragDropAcrossMultiDisplay DragDropAcrossMultiDisplay
-#endif
-
 // Test if the mouse gets moved properly to another display
 // during drag & drop operation.
-TEST_F(DragDropTest, MAYBE_DragDropAcrossMultiDisplay) {
+TEST_F(DragDropTest, DragDropAcrossMultiDisplay) {
   if (!SupportsMultipleDisplays())
     return;
 
   UpdateDisplay("400x400,400x400");
   aura::Window::Windows root_windows =
       Shell::GetInstance()->GetAllRootWindows();
   views::View* draggable_view = new DraggableView();
   draggable_view->set_drag_controller(NULL);
   draggable_view->SetBounds(0, 0, 100, 100);
   views::Widget* source =
@@ skipping 13 matching lines @@
 
   base::RunLoop().Run();
 
   EXPECT_TRUE(target_view->dropped());
 
   source->Close();
   target->Close();
 }
 
 }  // namespace ash