cros: Remove some OS platform ifdefs from ash

ash/wm/overview/window_selector_unittest.cc

Index: ash/wm/overview/window_selector_unittest.cc
diff --git a/ash/wm/overview/window_selector_unittest.cc b/ash/wm/overview/window_selector_unittest.cc
index 915d25316c1425182c6740066d17f768ae5711cf..83e0e37535b122f9b1d9b53d3cbf9c8cc52385ac 100644
--- a/ash/wm/overview/window_selector_unittest.cc
+++ b/ash/wm/overview/window_selector_unittest.cc
@@ -361,8 +361,6 @@ class WindowSelectorTest : public test::AshTestBase {
   DISALLOW_COPY_AND_ASSIGN(WindowSelectorTest);
 };
 
-#if !defined(OS_WIN) || defined(USE_ASH)
-// TODO(msw): Broken on Windows. http://crbug.com/584038
 // Tests that the text field in the overview menu is repositioned and resized
 // after a screen rotation.
 TEST_F(WindowSelectorTest, OverviewScreenRotation) {
@@ -396,7 +394,6 @@ TEST_F(WindowSelectorTest, OverviewScreenRotation) {
   EXPECT_EQ(expected_bounds.ToString(),
             text_filter->GetClientAreaBoundsInScreen().ToString());
 }
-#endif
 
 // Tests that an a11y alert is sent on entering overview mode.
 TEST_F(WindowSelectorTest, A11yAlertOnOverviewMode) {