chromeos: Remove AshTestBase::SupportsMultipleDisplays

chrome/browser/ui/window_sizer/window_sizer_ash_unittest.cc

Index: chrome/browser/ui/window_sizer/window_sizer_ash_unittest.cc
diff --git a/chrome/browser/ui/window_sizer/window_sizer_ash_unittest.cc b/chrome/browser/ui/window_sizer/window_sizer_ash_unittest.cc
index 373fa8b782040ffc37d2b14744cb52c288f76a76..60ac0903479cddf3c7f9bd7d49566d0642b01733 100644
--- a/chrome/browser/ui/window_sizer/window_sizer_ash_unittest.cc
+++ b/chrome/browser/ui/window_sizer/window_sizer_ash_unittest.cc
@@ -818,7 +818,7 @@ TEST_F(WindowSizerAshTest, DefaultStateBecomesMaximized) {
 // in that this uses real ash shell implementations + StateProvider
 // TargetDisplayProvider, rather than mocks.
 TEST_F(WindowSizerAshTest, DefaultBoundsInTargetDisplay) {
-  if (!SupportsMultipleDisplays() || !chrome::ShouldOpenAshOnStartup())
+  if (!chrome::ShouldOpenAshOnStartup())
     return;
   UpdateDisplay("500x500,600x600");