Revert 182703, this broke on win aura.

ash/test/ash_unittests.cc

Index: ash/test/ash_unittests.cc
===================================================================
--- ash/test/ash_unittests.cc	(revision 182715)
+++ ash/test/ash_unittests.cc	(working copy)
@@ -4,6 +4,20 @@
 
 #include "ash/test/test_suite.h"
 
+#if defined(OS_WIN)
+#include "base/command_line.h"
+#include "base/win/windows_version.h"
+#endif
+
 int main(int argc, char** argv) {
+#if defined(OS_WIN)
+  CommandLine::Init(argc, argv);
+  // Disabled on Win8 until they're passing cleanly. http://crbug.com/154081
+  // Can be optionally enabled via a command line flag (handy for developing)
+  // until such time.
+  if (base::win::GetVersion() >= base::win::VERSION_WIN8 &&
+      !CommandLine::ForCurrentProcess()->HasSwitch("ash-metro-tests"))
+    return 0;
+#endif
   return ash::test::AuraShellTestSuite(argc, argv).Run();
 }