chromeos: Remove AshTestBase::SupportsMultipleDisplays

ash/wm/toplevel_window_event_handler_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/wm/toplevel_window_event_handler.h"
 
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm/wm_event.h"
 #include "ash/common/wm/workspace_controller.h"
 #include "ash/public/cpp/shell_window_ids.h"
@@ skipping 796 matching lines @@
       FROM_HERE, base::Bind(&CheckHasCaptureAndReleaseCapture,
                             base::Unretained(window.get())));
   EXPECT_EQ(aura::client::MOVE_SUCCESSFUL,
             move_client->RunMoveLoop(window.get(), gfx::Vector2d(),
                                      aura::client::WINDOW_MOVE_SOURCE_TOUCH));
 }
 
 // Tests that dragging a snapped window to another display updates the window's
 // bounds correctly.
 TEST_F(ToplevelWindowEventHandlerTest, DragSnappedWindowToExternalDisplay) {
-  if (!SupportsMultipleDisplays())
-    return;
-
   UpdateDisplay("940x550,940x550");
   int64_t primary_id = display::Screen::GetScreen()->GetPrimaryDisplay().id();
   int64_t secondary_id = display_manager()->GetSecondaryDisplay().id();
   display::DisplayLayoutBuilder builder(primary_id);
   builder.SetSecondaryPlacement(secondary_id, display::DisplayPlacement::TOP,
                                 0);
   display_manager()->SetLayoutForCurrentDisplays(builder.Build());
 
   const gfx::Size initial_window_size(330, 230);
   std::unique_ptr<aura::Window> w1(CreateTestWindowInShellWithDelegateAndType(
@@ skipping 19 matching lines @@
   // The window is now fully contained in the secondary display.
   EXPECT_TRUE(display_manager()->GetSecondaryDisplay().bounds().Contains(
       w1->GetBoundsInScreen()));
 }
 
 // Showing the resize shadows when the mouse is over the window edges is tested
 // in resize_shadow_and_cursor_test.cc
 
 }  // namespace test
 }  // namespace ash