Use scoped_refptr and RefCountedThreadSafe for TargetPolicy.

sandbox/win/src/sandbox_policy_base.cc

Index: sandbox/win/src/sandbox_policy_base.cc
diff --git a/sandbox/win/src/sandbox_policy_base.cc b/sandbox/win/src/sandbox_policy_base.cc
index 52aa5b40e28482cc726ae076839f5546e9534621..499cdd96748e0b4f7c7e464f25abce78ae98e0bb 100644
--- a/sandbox/win/src/sandbox_policy_base.cc
+++ b/sandbox/win/src/sandbox_policy_base.cc
@@ -112,8 +112,7 @@ IntegrityLevel TargetPolicy::alternate_desktop_integrity_level_label_ =
     INTEGRITY_LEVEL_SYSTEM;
 
 TargetPolicy::TargetPolicy()
-    : ref_count(1),
-      lockdown_level_(USER_LOCKDOWN),
+    : lockdown_level_(USER_LOCKDOWN),
       initial_level_(USER_LOCKDOWN),
       job_level_(JOB_LOCKDOWN),
       ui_exceptions_(0),
@@ -152,15 +151,6 @@ TargetPolicy::~TargetPolicy() {
   ::DeleteCriticalSection(&lock_);
 }
 
-void TargetPolicy::AddRef() {
-  ::InterlockedIncrement(&ref_count);
-}
-
-void TargetPolicy::Release() {
-  if (0 == ::InterlockedDecrement(&ref_count))
-    delete this;
-}
-
 ResultCode TargetPolicy::SetTokenLevel(TokenLevel initial,
                                        TokenLevel lockdown) {
   if (initial < lockdown) {