Set the user agent for 0.6

blimp/client/core/settings/user_agent.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 BLIMP_CLIENT_APP_USER_AGENT_H_
-#define BLIMP_CLIENT_APP_USER_AGENT_H_
+#ifndef BLIMP_CLIENT_CORE_SETTINGS_USER_AGENT_H_
+#define BLIMP_CLIENT_CORE_SETTINGS_USER_AGENT_H_
 
 #include <string>
 
 namespace blimp {
+namespace client {
 
 /**
  * Builds a User-agent compatible string that describes the OS and CPU type.
  * e.g. Linux; Android 5.1.1; Nexus 6 Build/LMY49C
  */
 std::string GetOSVersionInfoForUserAgent();
 
+}  // namespace client
 }  // namespace blimp
 
-#endif  // BLIMP_CLIENT_APP_USER_AGENT_H_
+#endif  // BLIMP_CLIENT_CORE_SETTINGS_USER_AGENT_H_