Move base to DEPS

base/strings/nullable_string16.cc

Index: base/strings/nullable_string16.cc
diff --git a/base/strings/nullable_string16.cc b/base/strings/nullable_string16.cc
deleted file mode 100644
index 07f81d43396548e87f8972ed3071972f6848cae0..0000000000000000000000000000000000000000
--- a/base/strings/nullable_string16.cc
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright (c) 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.
-
-#include "base/strings/nullable_string16.h"
-
-#include <ostream>
-
-#include "base/strings/utf_string_conversions.h"
-
-namespace base {
-
-std::ostream& operator<<(std::ostream& out, const NullableString16& value) {
-  return value.is_null() ? out << "(null)" : out << UTF16ToUTF8(value.string());
-}
-
-}  // namespace base