Skip mulitple-dispay tests on win8

ash/screen_ash_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/screen_ash.h"
 
 #include "ash/display/display_controller.h"
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/window_util.h"
 #include "ui/aura/env.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_delegate.h"
 
 namespace ash {
 namespace test {
 
 typedef test::AshTestBase ScreenAshTest;
 
 TEST_F(ScreenAshTest, Bounds) {
+  if (!SupportsMultipleDisplays())
+    return;
+
   UpdateDisplay("600x600,500x500");
   Shell::GetPrimaryRootWindowController()->GetShelfLayoutManager()->
       SetAutoHideBehavior(ash::SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS);
 
   views::Widget* primary = views::Widget::CreateWindowWithContextAndBounds(
       NULL, CurrentContext(), gfx::Rect(10, 10, 100, 100));
   primary->Show();
   views::Widget* secondary = views::Widget::CreateWindowWithContextAndBounds(
       NULL, CurrentContext(), gfx::Rect(610, 10, 100, 100));
   secondary->Show();
@@ skipping 19 matching lines @@
             ScreenAsh::GetDisplayWorkAreaBoundsInParent(
                 primary->GetNativeView()).ToString());
   EXPECT_EQ("0,0 500x452",
             ScreenAsh::GetDisplayWorkAreaBoundsInParent(
                 secondary->GetNativeView()).ToString());
 }
 
 // Test verifies a stable handling of secondary screen widget changes
 // (crbug.com/226132).
 TEST_F(ScreenAshTest, StabilityTest) {
+  if (!SupportsMultipleDisplays())
+    return;
+
   UpdateDisplay("600x600,500x500");
   views::Widget* secondary = views::Widget::CreateWindowWithContextAndBounds(
       NULL, CurrentContext(), gfx::Rect(610, 10, 100, 100));
   EXPECT_EQ(Shell::GetAllRootWindows()[1],
       secondary->GetNativeView()->GetRootWindow());
   secondary->Show();
   secondary->Maximize();
   secondary->Show();
   secondary->SetFullscreen(true);
   secondary->Hide();
   secondary->Close();
 }
 
 TEST_F(ScreenAshTest, ConvertRect) {
+  if (!SupportsMultipleDisplays())
+    return;
+
   UpdateDisplay("600x600,500x500");
 
   views::Widget* primary = views::Widget::CreateWindowWithContextAndBounds(
       NULL, CurrentContext(), gfx::Rect(10, 10, 100, 100));
   primary->Show();
   views::Widget* secondary = views::Widget::CreateWindowWithContextAndBounds(
       NULL, CurrentContext(), gfx::Rect(610, 10, 100, 100));
   secondary->Show();
 
   EXPECT_EQ(
@@ skipping 10 matching lines @@
       ScreenAsh::ConvertRectToScreen(
           primary->GetNativeView(), gfx::Rect(30, 30, 100, 100)).ToString());
   EXPECT_EQ(
       "650,50 100x100",
       ScreenAsh::ConvertRectToScreen(
           secondary->GetNativeView(), gfx::Rect(40, 40, 100, 100)).ToString());
 }
 
 }  // namespace test
 }  // namespace ash