Mac: Move remote layer use to GpuOutputSurfaceMac

base/mac/scoped_typeref.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_MAC_SCOPED_TYPEREF_H_
 #define BASE_MAC_SCOPED_TYPEREF_H_
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/scoped_policy.h"
@@ skipping 49 matching lines @@
     if (object_ && policy == base::scoped_policy::RETAIN)
       object_ = Traits::Retain(object_);
   }
 
   ScopedTypeRef(const ScopedTypeRef<T, Traits>& that)
       : object_(that.object_) {
     if (object_)
       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.
   template<typename OtherTraits>
   ScopedTypeRef(const ScopedTypeRef<T, OtherTraits>& that_with_other_traits)
       : object_(that_with_other_traits.get()) {
     if (object_)
       object_ = Traits::Retain(object_);
   }
 
@@ skipping 60 matching lines @@
     return temp;
   }
 
  private:
   T object_;
 };
 
 }  // namespace base
 
 #endif  // BASE_MAC_SCOPED_TYPEREF_H_