Skip mulitple-dispay tests on win8

ash/display/display_error_dialog_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/display/display_error_dialog.h"
 
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "grit/ash_strings.h"
 #include "ui/aura/window.h"
@@ skipping 41 matching lines @@
   scoped_ptr<DisplayErrorObserver> observer_;
 
   DISALLOW_COPY_AND_ASSIGN(DisplayErrorDialogTest);
 };
 
 }
 
 // The test cases in this file usually check if the showing dialog doesn't
 // cause any crashes, and the code doesn't cause any memory leaks.
 TEST_F(DisplayErrorDialogTest, Normal) {
+  if (!SupportsMultipleDisplays())
+    return;
+
   UpdateDisplay("200x200,300x300");
   DisplayErrorDialog* dialog =
       DisplayErrorDialog::ShowDialog(chromeos::STATE_DUAL_MIRROR);
   EXPECT_TRUE(dialog);
   EXPECT_TRUE(dialog->GetWidget()->IsVisible());
   EXPECT_EQ(l10n_util::GetStringUTF16(IDS_ASH_DISPLAY_FAILURE_ON_MIRRORING),
             GetMessageContents(dialog));
   EXPECT_EQ(Shell::GetAllRootWindows()[1],
             dialog->GetWidget()->GetNativeView()->GetRootWindow());
 }
 
 TEST_F(DisplayErrorDialogTest, CallTwice) {
+  if (!SupportsMultipleDisplays())
+    return;
+
   UpdateDisplay("200x200,300x300");
   observer()->OnDisplayModeChangeFailed(chromeos::STATE_DUAL_MIRROR);
   const DisplayErrorDialog* dialog = observer()->dialog();
   EXPECT_TRUE(dialog);
 
   observer()->OnDisplayModeChangeFailed(chromeos::STATE_DUAL_MIRROR);
   EXPECT_EQ(dialog, observer()->dialog());
 }
 
 TEST_F(DisplayErrorDialogTest, CallWithDifferentState) {
+  if (!SupportsMultipleDisplays())
+    return;
+
   UpdateDisplay("200x200,300x300");
   observer()->OnDisplayModeChangeFailed(chromeos::STATE_DUAL_MIRROR);
   const DisplayErrorDialog* dialog = observer()->dialog();
   EXPECT_TRUE(dialog);
   EXPECT_EQ(l10n_util::GetStringUTF16(IDS_ASH_DISPLAY_FAILURE_ON_MIRRORING),
             GetMessageContents(dialog));
 
   observer()->OnDisplayModeChangeFailed(chromeos::STATE_DUAL_EXTENDED);
   EXPECT_EQ(dialog, observer()->dialog());
   EXPECT_EQ(l10n_util::GetStringUTF16(IDS_ASH_DISPLAY_FAILURE_ON_NON_MIRRORING),
             GetMessageContents(dialog));
 }
 
 TEST_F(DisplayErrorDialogTest, SingleDisplay) {
   UpdateDisplay("200x200");
   DisplayErrorDialog* dialog =
       DisplayErrorDialog::ShowDialog(chromeos::STATE_DUAL_MIRROR);
   EXPECT_TRUE(dialog);
   EXPECT_TRUE(dialog->GetWidget()->IsVisible());
   EXPECT_EQ(Shell::GetInstance()->GetPrimaryRootWindow(),
             dialog->GetWidget()->GetNativeView()->GetRootWindow());
 }
 
 TEST_F(DisplayErrorDialogTest, DisplayDisconnected) {
+  if (!SupportsMultipleDisplays())
+    return;
+
   UpdateDisplay("200x200,300x300");
   observer()->OnDisplayModeChangeFailed(chromeos::STATE_DUAL_MIRROR);
   EXPECT_TRUE(observer()->dialog());
 
   UpdateDisplay("200x200");
   // Disconnection will close the dialog but we have to run all pending tasks
   // to make the effect of the close.
   RunAllPendingInMessageLoop();
   EXPECT_FALSE(observer()->dialog());
 }
 
 }  // namespace internal
 }  // namespace ash