Mojo C++ bindings: more consistent Clone() and Equals().

mojo/public/cpp/bindings/tests/struct_with_traits_impl.h

 // Copyright 2016 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_TESTS_STRUCT_WITH_TRAITS_IMPL_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_TESTS_STRUCT_WITH_TRAITS_IMPL_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 18 matching lines @@
   int32_t value = 0;
 };
 
 // A type which knows how to look like a mojo::test::StructWithTraits mojom type
 // by way of mojo::StructTraits.
 class StructWithTraitsImpl {
  public:
   StructWithTraitsImpl();
   ~StructWithTraitsImpl();
 
+  StructWithTraitsImpl(const StructWithTraitsImpl& other);
+
   void set_bool(bool value) { bool_ = value; }
   bool get_bool() const { return bool_; }
 
   void set_uint32(uint32_t value) { uint32_ = value; }
   uint32_t get_uint32() const { return uint32_; }
 
   void set_uint64(uint64_t value) { uint64_ = value; }
   uint64_t get_uint64() const { return uint64_; }
 
   void set_string(std::string value) { string_ = value; }
@@ skipping 39 matching lines @@
 class PassByValueStructWithTraitsImpl {
  public:
   PassByValueStructWithTraitsImpl();
   PassByValueStructWithTraitsImpl(PassByValueStructWithTraitsImpl&& other);
   ~PassByValueStructWithTraitsImpl();
 
   ScopedHandle& get_mutable_handle() { return handle_; }
 
  private:
   ScopedHandle handle_;
+  DISALLOW_COPY_AND_ASSIGN(PassByValueStructWithTraitsImpl);
 };
 
 }  // namespace test
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_TESTS_STRUCT_WITH_TRAITS_IMPL_H_