Add a PassScopedPtr into base/memory.

base/bind_helpers.h

Index: base/bind_helpers.h
diff --git a/base/bind_helpers.h b/base/bind_helpers.h
index 1d5c7ca1e3df1c1fb5582b3f287a64c5897a031f..3834e4debb329f657b290a2309cda388379eb09f 100644
--- a/base/bind_helpers.h
+++ b/base/bind_helpers.h
@@ -322,6 +322,25 @@ struct UnwrapTraits<WeakPtr<T> > {
   static ForwardType Unwrap(const WeakPtr<T>& o) { return o; }
 };
 
+/*
+template <typename T>
+struct UnwrapTraits<subtle::PassScopedPtrAnchor<T> > {
+  typedef PassScopedPtr<T> ForwardType;
+  static PassScopedPtr<T> Unwrap(subtle::PassScopedPtrAnchor<T>& o) {
+    return &o;
+  }
+};
+*/
+
+template <typename T>
+struct UnwrapTraits<subtle::PassScopedPtrAnchor<T> > {
+  typedef subtle::PassScopedPtrAnchor<T>* ForwardType;
+  static subtle::PassScopedPtrAnchor<T>*
+      Unwrap(subtle::PassScopedPtrAnchor<T>& o) {
+    return &o;
+  }
+};
+
 template <typename T>
 struct UnwrapTraits<OwnedWrapper<T> > {
   typedef T* ForwardType;
@@ -348,6 +367,12 @@ struct MaybeRefcount<false, T[n]> {
 };
 
 template <typename T>
+struct MaybeRefcount<false, PassScopedPtr<T> > {
+  static void AddRef(const subtle::PassScopedPtrAnchor<T>&) {}
+  static void Release(const subtle::PassScopedPtrAnchor<T>&) {}
+};
+
+template <typename T>
 struct MaybeRefcount<true, T*> {
   static void AddRef(T* o) { o->AddRef(); }
   static void Release(T* o) { o->Release(); }
@@ -380,6 +405,12 @@ struct MaybeRefcount<true, const T*> {
 };
 
 template <typename T>
+struct MaybeRefcount<true, PassScopedPtr<T> > {
+  static void AddRef(const subtle::PassScopedPtrAnchor<T>&) {}
+  static void Release(const subtle::PassScopedPtrAnchor<T>&) {}
+};
+
+template <typename T>
 struct MaybeRefcount<true, WeakPtr<T> > {
   static void AddRef(const WeakPtr<T>&) {}
   static void Release(const WeakPtr<T>&) {}