Use scoped_refptr and RefCountedThreadSafe for TargetPolicy.

sandbox/win/tests/common/controller.cc

Index: sandbox/win/tests/common/controller.cc
diff --git a/sandbox/win/tests/common/controller.cc b/sandbox/win/tests/common/controller.cc
index 8d3e29dd9600bf643b55cdc46b01d2fe89a70baa..d4a74e08539fa45fca8d3a3fd8876cc79615f2a6 100644
--- a/sandbox/win/tests/common/controller.cc
+++ b/sandbox/win/tests/common/controller.cc
@@ -6,6 +6,7 @@
 
 #include <string>
 
+#include "base/memory/ref_counted.h"
 #include "base/memory/shared_memory.h"
 #include "base/process/process.h"
 #include "base/process/process_handle.h"
@@ -133,15 +134,12 @@ void TestRunner::Init(JobLevel job_level, TokenLevel startup_token,
 }
 
 TargetPolicy* TestRunner::GetPolicy() {
-  return policy_;
+  return policy_.get();
 }
 
 TestRunner::~TestRunner() {
   if (target_process_.IsValid() && kill_on_destruction_)
     ::TerminateProcess(target_process_.Get(), 0);
-
-  if (policy_)
-    policy_->Release();
 }
 
 bool TestRunner::AddRule(TargetPolicy::SubSystem subsystem,