Use scoped_refptr and RefCountedThreadSafe for TargetPolicy.

sandbox/win/src/sandbox_policy.h

Index: sandbox/win/src/sandbox_policy.h
diff --git a/sandbox/win/src/sandbox_policy.h b/sandbox/win/src/sandbox_policy.h
index 12c0b863c885aa55efb9e059b052f85197ba0b97..29ebc785c247b8d5b4490f513893ea91dca8a5e7 100644
--- a/sandbox/win/src/sandbox_policy.h
+++ b/sandbox/win/src/sandbox_policy.h
@@ -12,6 +12,7 @@
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "base/memory/ref_counted.h"
 #include "base/strings/string16.h"
 #include "base/win/scoped_handle.h"
 #include "sandbox/win/src/app_container.h"
@@ -34,7 +35,7 @@ typedef std::vector<base::win::ScopedHandle*> HandleList;
 // A Windows sandbox policy. All public methods are virtual since they may be
 // called from a dll, while the implementation of the methods lives in the main
 // exe.
-class TargetPolicy {
+class TargetPolicy : public base::RefCountedThreadSafe<TargetPolicy> {
  public:
   TargetPolicy();
 
@@ -81,16 +82,6 @@ class TargetPolicy {
                            // even if the process cannot access that subsystem.
   };
 
-  // Increments the reference count of this object. The reference count must
-  // be incremented if this interface is given to another component.
-  virtual void AddRef();
-
-  // Decrements the reference count of this object. When the reference count
-  // is zero the object is automatically destroyed.
-  // Indicates that the caller is done with this interface. After calling
-  // release no other method should be called.
-  virtual void Release();
-
   // Sets the security level for the target process' two tokens.
   // This setting is permanent and cannot be changed once the target process is
   // spawned.
@@ -328,8 +319,6 @@ class TargetPolicy {
   // The policy takes ownership of them.
   typedef std::list<TargetProcess*> TargetSet;
   TargetSet targets_;
-  // Standard object-lifetime reference counter.
-  volatile LONG ref_count;
   // The user-defined global policy settings.
   TokenLevel lockdown_level_;
   TokenLevel initial_level_;