Add Equals() to mojom structs and related types.

mojo/public/cpp/bindings/lib/template_util.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_TEMPLATE_UTIL_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_TEMPLATE_UTIL_H_
 
 namespace mojo {
 namespace internal {
 
@@ skipping 86 matching lines @@
                             !IsSame<Base const, void const>::value;
 };
 
 template <class T>
 struct RemovePointer {};
 template <class T>
 struct RemovePointer<T*> {
   typedef T type;
 };
 
+template <template <typename...> class Template, typename T>
+struct IsSpecializationOf : FalseType {};
+
+template <template <typename...> class Template, typename... Args>
+struct IsSpecializationOf<Template, Template<Args...>> : TrueType {};
+
+template <class A, class B>
+struct LogicalOr : IntegralConstant<bool, A::value || B::value> {};
+
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_TEMPLATE_UTIL_H_