Make members of Singleton<T> private and only visible to the singleton type.

chrome/common/sqlite_utils.cc

Index: chrome/common/sqlite_utils.cc
diff --git a/chrome/common/sqlite_utils.cc b/chrome/common/sqlite_utils.cc
index d11b925a7ebe74711874c4d7d10ad59a7b0266de..9d16c7fe086276db20ae37a21a82d94997fd1b27 100644
--- a/chrome/common/sqlite_utils.cc
+++ b/chrome/common/sqlite_utils.cc
@@ -8,8 +8,8 @@
 
 #include "base/file_path.h"
 #include "base/lock.h"
+#include "base/lazy_instance.h"
 #include "base/logging.h"
-#include "base/singleton.h"
 #include "base/stl_util-inl.h"
 #include "base/string16.h"
 
@@ -76,10 +76,13 @@ class DefaultSQLErrorHandlerFactory : public SQLErrorHandlerFactory {
   Lock lock_;
 };
 
+static base::LazyInstance<DefaultSQLErrorHandlerFactory>
+    g_default_sql_error_handler_factory(base::LINKER_INITIALIZED);
+
 SQLErrorHandlerFactory* GetErrorHandlerFactory() {
   // TODO(cpu): Testing needs to override the error handler.
   // Destruction of DefaultSQLErrorHandlerFactory handled by at_exit manager.
-  return Singleton<DefaultSQLErrorHandlerFactory>::get();
+  return g_default_sql_error_handler_factory.Pointer();
 }
 
 namespace sqlite_utils {