chromeos: Remove AshTestBase::SupportsMultipleDisplays

ash/drag_drop/drag_drop_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/drag_drop/drag_drop_controller.h"
 
 #include "ash/common/drag_drop/drag_image_view.h"
 #include "ash/drag_drop/drag_drop_tracker.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
@@ skipping 918 matching lines @@
 
  public:
   gfx::Point window_location_on_destroying_;
 };
 
 }  // namespace
 
 // Verifies the drag image moves back to the position where drag is started
 // across displays when drag is cancelled.
 TEST_F(DragDropControllerTest, DragCancelAcrossDisplays) {
-  if (!SupportsMultipleDisplays())
-    return;
-
   UpdateDisplay("400x400,400x400");
   aura::Window::Windows root_windows =
       Shell::GetInstance()->GetAllRootWindows();
   for (aura::Window::Windows::iterator iter = root_windows.begin();
        iter != root_windows.end(); ++iter) {
     aura::client::SetDragDropClient(*iter, drag_drop_controller_.get());
   }
 
   ui::OSExchangeData data;
   data.SetString(base::UTF8ToUTF16("I am being dragged"));
@@ skipping 58 matching lines @@
     EXPECT_EQ("405,405", observer.window_location_on_destroying().ToString());
   }
   for (aura::Window::Windows::iterator iter = root_windows.begin();
        iter != root_windows.end(); ++iter) {
     aura::client::SetDragDropClient(*iter, NULL);
   }
 }
 
 // Verifies that a drag is aborted if a display is disconnected during the drag.
 TEST_F(DragDropControllerTest, DragCancelOnDisplayDisconnect) {
-  if (!SupportsMultipleDisplays())
-    return;
-
   UpdateDisplay("400x400,400x400");
   for (aura::Window* root : Shell::GetInstance()->GetAllRootWindows()) {
     aura::client::SetDragDropClient(root, drag_drop_controller_.get());
   }
 
   ui::OSExchangeData data;
   data.SetString(base::UTF8ToUTF16("I am being dragged"));
   std::unique_ptr<views::Widget> widget(CreateNewWidget());
   aura::Window* window = widget->GetNativeWindow();
   drag_drop_controller_->StartDragAndDrop(
@@ skipping 65 matching lines @@
             drag_drop_controller_->drag_string_);
   EXPECT_EQ(1, drag_view->num_drag_enters_);
   EXPECT_EQ(2, drag_view->num_drag_updates_);
   EXPECT_EQ(1, drag_view->num_drops_);
   EXPECT_EQ(0, drag_view->num_drag_exits_);
   EXPECT_TRUE(drag_view->drag_done_received_);
 }
 
 }  // namespace test
 }  // namespace ash