Mac: Move remote layer use to GpuOutputSurfaceMac

base/mac/scoped_typeref.h

Index: base/mac/scoped_typeref.h
diff --git a/base/mac/scoped_typeref.h b/base/mac/scoped_typeref.h
index eed5afb539e35ce7b6a25a4f56daa87291b92e4b..6edbf08076728d97be3d5f79827685bbde9b040d 100644
--- a/base/mac/scoped_typeref.h
+++ b/base/mac/scoped_typeref.h
@@ -67,6 +67,14 @@ class ScopedTypeRef {
       object_ = Traits::Retain(object_);
   }
 
+  // This allows passing an object to a function that takes its superclass.
+  template <typename R, typename RTraits>
+  ScopedTypeRef(const ScopedTypeRef<R, RTraits>& that_as_subclass)
+      : object_(that_as_subclass.get()) {
+    if (object_)
+      object_ = Traits::Retain(object_);
+  }
+
   // Without this, passing a ScopedTypeRef<A,TraitsX> to construct a
   // ScopedTypeRef<A,TraitsY> would automatically cast down to an A, and then
   // ASSUME ownership of A, when a retain is what was needed.