Remove redundant disabling of DesktopMediaListAshTest.

chrome/browser/media/webrtc/desktop_media_list_ash_unittest.cc

Index: chrome/browser/media/webrtc/desktop_media_list_ash_unittest.cc
diff --git a/chrome/browser/media/webrtc/desktop_media_list_ash_unittest.cc b/chrome/browser/media/webrtc/desktop_media_list_ash_unittest.cc
index fd11ac76447aad67d3adb576ab1ec6cd56da9e0e..39d98cc18dc2f340623e3740c4bb4f8e0e84f4ec 100644
--- a/chrome/browser/media/webrtc/desktop_media_list_ash_unittest.cc
+++ b/chrome/browser/media/webrtc/desktop_media_list_ash_unittest.cc
@@ -103,14 +103,7 @@ TEST_F(DesktopMediaListAshTest, ScreenOnly) {
   base::RunLoop().Run();
 }
 
-// Times out on Win DrMemory bot. http://crbug.com/493187
-#if defined(OS_WIN)
-#define MAYBE_WindowOnly DISABLED_WindowOnly
-#else
-#define MAYBE_WindowOnly WindowOnly
-#endif
-
-TEST_F(DesktopMediaListAshTest, MAYBE_WindowOnly) {
+TEST_F(DesktopMediaListAshTest, WindowOnly) {
   CreateList(DesktopMediaListAsh::WINDOWS);
 
   std::unique_ptr<aura::Window> window(CreateTestWindowInShellWithId(0));