Add Equals() to mojom structs and related types.

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)
  public:
   typedef internal::ArrayTraits<T, internal::IsMoveOnlyType<T>::value> Traits;
@@ skipping 75 matching lines @@
   // Please note that calling this method will fail compilation if the element
   // type cannot be cloned (which usually means that it is a Mojo handle type or
   // a type contains Mojo handles).
   Array Clone() const {
     Array result;
     result.is_null_ = is_null_;
     Traits::Clone(vec_, &result.vec_);
     return result.Pass();
   }
 
+  bool Equals(const Array& other) const {
+    if (is_null() != other.is_null())
+      return false;
+    if (size() != other.size())
+      return false;
+    for (size_t i = 0; i < size(); ++i) {
+      if (!internal::ValueTraits<T>::Equals(at(i), other.at(i)))
+        return false;
+    }
+    return true;
+  }
+
  private:
   typedef std::vector<StorageType> Array::*Testable;
 
  public:
   operator Testable() const { return is_null_ ? 0 : &Array::vec_; }
 
  private:
   void Take(Array* other) {
     reset();
     Swap(other);
@@ skipping 22 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_