chromeos: Remove AshTestBase::SupportsMultipleDisplays

ash/tooltips/tooltip_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/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
@@ skipping 109 matching lines @@
 
   // Show the cursor and re-check.
   RunAllPendingInMessageLoop();
   ash::Shell::GetInstance()->cursor_manager()->EnableMouseEvents();
   RunAllPendingInMessageLoop();
   helper_->FireTooltipTimer();
   EXPECT_TRUE(helper_->IsTooltipVisible());
 }
 
 TEST_F(TooltipControllerTest, TooltipsOnMultiDisplayShouldNotCrash) {
-  if (!SupportsMultipleDisplays())
-    return;
-
   UpdateDisplay("1000x600,600x400");
   aura::Window::Windows root_windows = Shell::GetAllRootWindows();
   std::unique_ptr<views::Widget> widget1(
       CreateNewWidgetWithBoundsOn(0, gfx::Rect(10, 10, 100, 100)));
   TooltipTestView* view1 = new TooltipTestView;
   AddViewToWidgetAndResize(widget1.get(), view1);
   view1->set_tooltip_text(base::ASCIIToUTF16("Tooltip Text for view 1"));
   EXPECT_EQ(widget1->GetNativeView()->GetRootWindow(), root_windows[0]);
 
   std::unique_ptr<views::Widget> widget2(
@@ skipping 20 matching lines @@
   // be able to show tooltips on the primary display.
   ui::test::EventGenerator generator1(root_windows[0]);
   generator1.MoveMouseRelativeTo(widget1->GetNativeView(),
                                  view1->bounds().CenterPoint());
   helper_->FireTooltipTimer();
   EXPECT_TRUE(helper_->IsTooltipVisible());
 }
 
 }  // namespace test
 }  // namespace ash