Set the override redirect in browser_tests on aura/x11

content/public/test/browser_test_base.cc

Index: content/public/test/browser_test_base.cc
diff --git a/content/public/test/browser_test_base.cc b/content/public/test/browser_test_base.cc
index bc1b618e91c137ae6c5a4848c8f9bbaee9878682..d0a33f021150bf55cae8e285dfad8cd9bd3b8e40 100644
--- a/content/public/test/browser_test_base.cc
+++ b/content/public/test/browser_test_base.cc
@@ -40,6 +40,9 @@
 
 #if defined(USE_AURA)
 #include "content/browser/compositor/image_transport_factory.h"
+#if defined(USE_X11)
+#include "ui/aura/window_tree_host_x11.h"
+#endif
 #endif
 
 namespace content {
@@ -125,6 +128,10 @@ BrowserTestBase::BrowserTestBase()
   base::mac::SetOverrideAmIBundled(true);
 #endif
 
+#if defined(USE_AURA) && defined(USE_X11)
+  aura::test::SetUseOverrideRedirectWindowByDefault(true);
+#endif
+
 #if defined(OS_POSIX)
   handle_sigterm_ = true;
 #endif