Allow constructing {Interface,Struct}Ptr from nullptr

mojo/public/cpp/bindings/array.h

 // Copyright 2013 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_ARRAY_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_ARRAY_H_
 
 #include <string.h>
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
 #include "mojo/public/cpp/bindings/lib/array_internal.h"
 #include "mojo/public/cpp/bindings/lib/bindings_internal.h"
 #include "mojo/public/cpp/bindings/lib/template_util.h"
 #include "mojo/public/cpp/bindings/type_converter.h"
 
 namespace mojo {
 
 template <typename T>
 class Array {
-  MOJO_MOVE_ONLY_TYPE_FOR_CPP_03(Array, RValue)
+  MOJO_MOVE_ONLY_TYPE(Array)
  public:
   typedef internal::ArrayTraits<T, internal::IsMoveOnlyType<T>::value> Traits;
   typedef typename Traits::ConstRefType ConstRefType;
   typedef typename Traits::RefType RefType;
   typedef typename Traits::StorageType StorageType;
   typedef typename Traits::ForwardType ForwardType;
 
   typedef internal::Array_Data<typename internal::WrapperTraits<T>::DataType>
       Data_;
 
   Array() : is_null_(true) {}
   explicit Array(size_t size) : vec_(size), is_null_(false) {
     Traits::Initialize(&vec_);
   }
   ~Array() { Traits::Finalize(&vec_); }
 
-  Array(RValue other) : is_null_(true) { Take(other.object); }
-  Array& operator=(RValue other) {
-    Take(other.object);
+  Array(Array&& other) : is_null_(true) { Take(&other); }
+  Array& operator=(Array&& other) {
+    Take(&other);
     return *this;
   }
 
   static Array New(size_t size) { return Array(size).Pass(); }
 
   template <typename U>
   static Array From(const U& other) {
     return TypeConverter<Array, U>::Convert(other);
   }
 
@@ skipping 102 matching lines @@
       for (size_t i = 0; i < input.size(); ++i)
         result[i] = TypeConverter<E, T>::Convert(input[i]);
     }
     return result;
   }
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_ARRAY_H_