Enforce capability spec renderer <--> browser

content/browser/mojo/merge_dictionary.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 CONTENT_BROWSER_MOJO_MERGE_DICTIONARY_H_
+#define CONTENT_BROWSER_MOJO_MERGE_DICTIONARY_H_
+
+#include "base/values.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+// Similar to base::DictionaryValue::MergeDictionary(), except concatenates
+// ListValue contents.
+// This is explicitly not part of base::DictionaryValue at brettw's request.
+void CONTENT_EXPORT MergeDictionary(base::DictionaryValue* target,
+                                    const base::DictionaryValue* source);
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_MOJO_MERGE_DICTIONARY_H_