Skip mulitple-dispay tests on win8

ash/wm/frame_painter_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/wm/frame_painter.h"
 
 #include "ash/ash_constants.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/test/ash_test_base.h"
@@ skipping 457 matching lines @@
 #if defined(OS_WIN)
 // Multiple displays are not supported on Windows Ash. http://crbug.com/165962
 #define MAYBE_UseSoloWindowHeaderMultiDisplay \
         DISABLED_UseSoloWindowHeaderMultiDisplay
 #else
 #define MAYBE_UseSoloWindowHeaderMultiDisplay \
         UseSoloWindowHeaderMultiDisplay
 #endif
 
 TEST_F(FramePainterTest, MAYBE_UseSoloWindowHeaderMultiDisplay) {
+  if (!SupportsMultipleDisplays())
+    return;
+
   UpdateDisplay("1000x600,600x400");
 
   // Create two widgets and painters for them.
   scoped_ptr<Widget> w1(CreateTestWidget());
   FramePainter p1;
   ImageButton size1(NULL);
   ImageButton close1(NULL);
   p1.Init(w1.get(), NULL, &size1, &close1, FramePainter::SIZE_BUTTON_MAXIMIZES);
   w1->SetBounds(gfx::Rect(0, 0, 100, 100));
   w1->Show();
@@ skipping 160 matching lines @@
   SetTrackedByWorkspace(w->GetNativeWindow(), false);
   EXPECT_FALSE(p.ShouldUseMinimalHeaderStyle(FramePainter::THEMED_NO));
   SetTrackedByWorkspace(w->GetNativeWindow(), true);
 
   w->GetNativeWindow()->GetRootWindow()->SetProperty(
       ash::internal::kCyclingThroughWorkspacesKey, true);
   EXPECT_FALSE(p.ShouldUseMinimalHeaderStyle(FramePainter::THEMED_NO));
 }
 
 }  // namespace ash