Base: Make RegistryOverrideManager support sharded/parallel tests.

chrome_frame/test/util_unittests.cc

Index: chrome_frame/test/util_unittests.cc
diff --git a/chrome_frame/test/util_unittests.cc b/chrome_frame/test/util_unittests.cc
index e6dbd652abd30a6faa677266fe93e7c703a8cad2..74e41f9c4f51e5ef0052b7a162d9218cf9d07137 100644
--- a/chrome_frame/test/util_unittests.cc
+++ b/chrome_frame/test/util_unittests.cc
@@ -34,10 +34,6 @@ class UtilTests : public testing::Test {
     DeleteAllSingletons();
   }
 
-  void TearDown() {
-    registry_virtualization_.RemoveAllOverrides();
-  }
-
   // This is used to manage life cycle of PolicySettings singleton.
   // base::ShadowingAtExitManager at_exit_manager_;
   chrome_frame_test::ScopedVirtualizeHklmAndHkcu registry_virtualization_;