chromeos: Remove AshTestBase::SupportsMultipleDisplays

ash/wm/dock/docked_window_resizer_unittest.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/common/wm/dock/docked_window_resizer.h"
 
 #include "ash/common/ash_switches.h"
 #include "ash/common/shelf/shelf_widget.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/test/test_shelf_delegate.h"
@@ skipping 635 matching lines @@
   DragMove(-10, 10);
   DragRevert();
   // The window should be in default container and not docked.
   EXPECT_EQ(kShellWindowId_DefaultContainer, window->parent()->id());
   // Docked area alignment should be cleared.
   EXPECT_EQ(DOCKED_ALIGNMENT_NONE, docked_alignment(manager));
 }
 
 // Move a docked window to the second display
 TEST_P(DockedWindowResizerTest, DragAcrossDisplays) {
-  if (!SupportsMultipleDisplays())
-    return;
-
   UpdateDisplay("800x800,800x800");
   aura::Window::Windows root_windows = Shell::GetAllRootWindows();
   EXPECT_EQ(2, static_cast<int>(root_windows.size()));
   std::unique_ptr<aura::Window> window(
       CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
   EXPECT_EQ(root_windows[0], window->GetRootWindow());
 
   DragRelativeToEdge(DOCKED_EDGE_RIGHT, window.get(), 0);
   // The window should be docked at the right edge.
   EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
@@ skipping 826 matching lines @@
   EXPECT_TRUE(window_state->IsMaximized());
 }
 
 // Tests run twice - on both panels and normal windows
 INSTANTIATE_TEST_CASE_P(NormalOrPanel,
                         DockedWindowResizerTest,
                         testing::Values(ui::wm::WINDOW_TYPE_NORMAL,
                                         ui::wm::WINDOW_TYPE_PANEL));
 
 }  // namespace ash