cros: Remove some OS platform ifdefs from ash

ash/wm/panels/panel_window_resizer_unittest.cc

Index: ash/wm/panels/panel_window_resizer_unittest.cc
diff --git a/ash/wm/panels/panel_window_resizer_unittest.cc b/ash/wm/panels/panel_window_resizer_unittest.cc
index 5ac07d8dd7d96a907e1cc7725eea419dcd1ea561..21bcf6673344e733ad9326bdf302be88593fdf1c 100644
--- a/ash/wm/panels/panel_window_resizer_unittest.cc
+++ b/ash/wm/panels/panel_window_resizer_unittest.cc
@@ -224,7 +224,6 @@ class PanelWindowResizerTransientTest
   DISALLOW_COPY_AND_ASSIGN(PanelWindowResizerTransientTest);
 };
 
-#if !defined(OS_WIN)
 // Verifies a window can be dragged from the panel and detached and then
 // reattached.
 TEST_F(PanelWindowResizerTest, PanelDetachReattachBottom) {
@@ -271,7 +270,6 @@ TEST_F(PanelWindowResizerTest, DetachThenHideShelf) {
   EXPECT_FALSE(state->IsMinimized());
   EXPECT_EQ(expected_bounds.ToString(), window->GetBoundsInScreen().ToString());
 }
-#endif  // !defined(OS_WIN)
 
 TEST_F(PanelWindowResizerTest, PanelDetachReattachMultipleDisplays) {
   if (!SupportsMultipleDisplays())