chromeos: Remove AshTestBase::SupportsMultipleDisplays

ash/drag_drop/drag_drop_tracker_unittest.cc

Index: ash/drag_drop/drag_drop_tracker_unittest.cc
diff --git a/ash/drag_drop/drag_drop_tracker_unittest.cc b/ash/drag_drop/drag_drop_tracker_unittest.cc
index 9e4cf69b48ba6723393e0a0bd689a04edfd2cb30..3694b06208d43dce048c0e4a1b5a3742c4fc0902 100644
--- a/ash/drag_drop/drag_drop_tracker_unittest.cc
+++ b/ash/drag_drop/drag_drop_tracker_unittest.cc
@@ -50,9 +50,6 @@ class DragDropTrackerTest : public test::AshTestBase {
 };
 
 TEST_F(DragDropTrackerTest, GetTarget) {
-  if (!SupportsMultipleDisplays())
-    return;
-
   UpdateDisplay("200x200,300x300");
   aura::Window::Windows root_windows = Shell::GetAllRootWindows();
   EXPECT_EQ(2U, root_windows.size());
@@ -115,9 +112,6 @@ TEST_F(DragDropTrackerTest, GetTarget) {
 }
 
 TEST_F(DragDropTrackerTest, ConvertEvent) {
-  if (!SupportsMultipleDisplays())
-    return;
-
   UpdateDisplay("200x200,300x300");
   aura::Window::Windows root_windows = Shell::GetAllRootWindows();
   EXPECT_EQ(2U, root_windows.size());