cc mojo: Use ArrayDataViews in RenderPasses

mojo/public/cpp/bindings/lib/map_serialization.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 MOJO_PUBLIC_CPP_BINDINGS_LIB_MAP_SERIALIZATION_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_MAP_SERIALIZATION_H_
 
 #include <type_traits>
 #include <vector>
 
@@ skipping 28 matching lines @@
   MaybeConstUserType& input_;
   MaybeConstIterator iter_;
 };
 
 // Used as the UserTypeReader template parameter of ArraySerializer.
 template <typename MaybeConstUserType>
 class MapKeyReader : public MapReaderBase<MaybeConstUserType> {
  public:
   using Base = MapReaderBase<MaybeConstUserType>;
   using Traits = typename Base::Traits;
+  using MaybeConstIterator = typename Base::MaybeConstIterator;
 
   explicit MapKeyReader(MaybeConstUserType& input) : Base(input) {}
   ~MapKeyReader() {}
 
-  const typename Traits::Key& GetNext() {
-    const typename Traits::Key& key = Traits::GetKey(this->iter_);
+  using GetNextResult =
+      decltype(Traits::GetKey(std::declval<MaybeConstIterator&>()));
+  GetNextResult GetNext() {
+    GetNextResult key = Traits::GetKey(this->iter_);
     Traits::AdvanceIterator(this->iter_);
     return key;
   }
 };
 
 // Used as the UserTypeReader template parameter of ArraySerializer.
 template <typename MaybeConstUserType>
 class MapValueReader : public MapReaderBase<MaybeConstUserType> {
  public:
   using Base = MapReaderBase<MaybeConstUserType>;
@@ skipping 105 matching lines @@
         return false;
     }
     return true;
   }
 };
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_MAP_SERIALIZATION_H_