Mojo C++ bindings: introduce mojo::WTFMap for blink bindings.

mojo/public/cpp/bindings/lib/array_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_ARRAY_SERIALIZATION_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_ARRAY_SERIALIZATION_H_
 
 #include <stddef.h>
 #include <string.h>  // For |memcpy()|.
 
@@ skipping 146 matching lines @@
           typename MaybeConstUserType,
           typename UserTypeReader>
 struct ArraySerializer<MojomType,
                        MaybeConstUserType,
                        UserTypeReader,
                        ArraySerializerType::BOOLEAN> {
   using UserType = typename std::remove_const<MaybeConstUserType>::type;
   using Traits = ArrayTraits<UserType>;
   using Data = typename MojomType::Data_;
 
-  static_assert(std::is_same<bool, typename UserType::Element>::value,
+  static_assert(std::is_same<bool, typename Traits::Element>::value,
                 "Incorrect array serializer");
 
   static size_t GetSerializedSize(UserTypeReader* input,
                                   SerializationContext* context) {
     return sizeof(Data) + Align((input->GetSize() + 7) / 8);
   }
 
   static void SerializeElements(UserTypeReader* input,
                                 Buffer* buf,
                                 Data* output,
@@ skipping 279 matching lines @@
     if (!input)
       return CallSetToNullIfExists<Traits>(output);
     return Impl::DeserializeElements(input, output, context);
   }
 };
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_ARRAY_SERIALIZATION_H_