Move base to DEPS

base/strings/nullable_string16.h

-// Copyright (c) 2010 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 BASE_STRINGS_NULLABLE_STRING16_H_
-#define BASE_STRINGS_NULLABLE_STRING16_H_
-
-#include <iosfwd>
-
-#include "base/base_export.h"
-#include "base/strings/string16.h"
-
-namespace base {
-
-// This class is a simple wrapper for string16 which also contains a null
-// state.  This should be used only where the difference between null and
-// empty is meaningful.
-class NullableString16 {
- public:
-  NullableString16() : is_null_(true) { }
-  NullableString16(const string16& string, bool is_null)
-      : string_(string), is_null_(is_null) {
-  }
-
-  const string16& string() const { return string_; }
-  bool is_null() const { return is_null_; }
-
- private:
-  string16 string_;
-  bool is_null_;
-};
-
-inline bool operator==(const NullableString16& a, const NullableString16& b) {
-  return a.is_null() == b.is_null() && a.string() == b.string();
-}
-
-inline bool operator!=(const NullableString16& a, const NullableString16& b) {
-  return !(a == b);
-}
-
-BASE_EXPORT std::ostream& operator<<(std::ostream& out,
-                                     const NullableString16& value);
-
-}  // namespace base
-
-#endif  // BASE_STRINGS_NULLABLE_STRING16_H_