Mojo C++ bindings: provide data view for all object types.

mojo/public/cpp/bindings/lib/bindings_internal.h

Index: mojo/public/cpp/bindings/lib/bindings_internal.h
diff --git a/mojo/public/cpp/bindings/lib/bindings_internal.h b/mojo/public/cpp/bindings/lib/bindings_internal.h
index b37d87273f7b7aab715177084a3962731300250c..a16ce0ed888d8fb9060640dbe377223b4999999a 100644
--- a/mojo/public/cpp/bindings/lib/bindings_internal.h
+++ b/mojo/public/cpp/bindings/lib/bindings_internal.h
@@ -20,6 +20,9 @@ template <typename T>
 class Array;
 
 template <typename T>
+class ArrayDataView;
+
+template <typename T>
 class AssociatedInterfacePtrInfo;
 
 template <typename T>
@@ -34,14 +37,25 @@ class InterfaceRequest;
 template <typename K, typename V>
 class Map;
 
+template <typename K, typename V>
+class MapDataView;
+
+class NativeStruct;
+
+class NativeStructDataView;
+
 class String;
 
+class StringDataView;
+
 template <typename T>
 class StructPtr;
 
 template <typename T>
 class InlinedStructPtr;
 
+using NativeStructPtr = StructPtr<NativeStruct>;
+
 namespace internal {
 
 // Please note that this is a different value than |mojo::kInvalidHandleValue|,
@@ -328,6 +342,32 @@ struct EnumHashImpl {
   }
 };
 
+template <typename T>
+struct DataViewTraits {
+  using MojomType = T;
+};
+
+template <typename T>
+struct DataViewTraits<ArrayDataView<T>> {
+  using MojomType = Array<typename DataViewTraits<T>::MojomType>;
+};
+
+template <typename K, typename V>
+struct DataViewTraits<MapDataView<K, V>> {
+  using MojomType = Map<typename DataViewTraits<K>::MojomType,
+                        typename DataViewTraits<V>::MojomType>;
+};
+
+template <>
+struct DataViewTraits<StringDataView> {
+  using MojomType = String;
+};
+
+template <>
+struct DataViewTraits<NativeStructDataView> {
+  using MojomType = NativeStructPtr;
+};
+
 }  // namespace internal
 }  // namespace mojo