ash: Disable MirrorToDockedWithFullscreen on Windows.

ash/display/display_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/display/display_controller.h"
 
 #include "ash/ash_switches.h"
 #include "ash/display/display_info.h"
 #include "ash/display/display_layout_store.h"
 #include "ash/display/display_manager.h"
@@ skipping 532 matching lines @@
                               float device_scale_factor) {
   DisplayInfo info(id, "", false);
   info.SetBounds(bounds);
   info.set_device_scale_factor(device_scale_factor);
   return info;
 }
 
 }  // namespace
 
 TEST_F(DisplayControllerTest, MirrorToDockedWithFullscreen) {
+  if (!SupportsMultipleDisplays())
+    return;
+
   // Creates windows to catch activation change event.
   scoped_ptr<aura::Window> w1(CreateTestWindowInShellWithId(1));
   w1->Focus();
 
   // Docked mode.
   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
 
   const DisplayInfo internal_display_info =
       CreateDisplayInfo(1, gfx::Rect(0, 0, 500, 500), 2.0f);
   const DisplayInfo external_display_info =
@@ skipping 768 matching lines @@
   EXPECT_EQ("aura_root_x", GetXWindowName(secondary->GetHost()));
 
   // Switching back to single display.
   UpdateDisplay("300x400");
   EXPECT_EQ("aura_root_0", GetXWindowName(
       Shell::GetPrimaryRootWindow()->GetHost()));
 }
 #endif
 
 }  // namespace ash