Add a new GetInstance() method for singleton classes, take 2.

ceee/ie/plugin/bho/cookie_accountant.cc

Index: ceee/ie/plugin/bho/cookie_accountant.cc
diff --git a/ceee/ie/plugin/bho/cookie_accountant.cc b/ceee/ie/plugin/bho/cookie_accountant.cc
index 1da3256d88b27a258cf7dea250bb8a31aa4f35dc..3d0f3f134c0dffb9e2926c523603e2540f957e07 100644
--- a/ceee/ie/plugin/bho/cookie_accountant.cc
+++ b/ceee/ie/plugin/bho/cookie_accountant.cc
@@ -44,10 +44,15 @@ CookieAccountant::~CookieAccountant() {
 ProductionCookieAccountant::ProductionCookieAccountant() {
 }
 
+// static
+ProductionCookieAccountant* ProductionCookieAccountant::GetInstance() {
+  return Singleton<ProductionCookieAccountant>::get();
+}
+
 CookieAccountant* CookieAccountant::GetInstance() {
   // Unit tests can set singleton_instance_ directly.
   if (singleton_instance_ == NULL)
-    singleton_instance_ = ProductionCookieAccountant::get();
+    singleton_instance_ = ProductionCookieAccountant::GetInstance();
   return singleton_instance_;
 }