Simple lint fixes

webrtc/pc/externalhmac.h

 /*
  *  Copyright 2014 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef TALK_SESSION_MEDIA_EXTERNAL_HMAC_H_
-#define TALK_SESSION_MEDIA_EXTERNAL_HMAC_H_
+#ifndef WEBRTC_PC_EXTERNALHMAC_H_
+#define WEBRTC_PC_EXTERNALHMAC_H_
 
 // External libsrtp HMAC auth module which implements methods defined in
 // auth_type_t.
 // The default auth module will be replaced only when the ENABLE_EXTERNAL_AUTH
 // flag is enabled. This allows us to access to authentication keys,
 // as the default auth implementation doesn't provide access and avoids
 // hashing each packet twice.
 
 // How will libsrtp select this module?
 // Libsrtp defines authentication function types identified by an unsigned
@@ skipping 42 matching lines @@
 
 err_status_t external_hmac_compute(ExternalHmacContext* state,
                                    const void* message,
                                    int msg_octets,
                                    int tag_len,
                                    uint8_t* result);
 
 err_status_t external_crypto_init();
 
 #endif  // defined(HAVE_SRTP) && defined(ENABLE_EXTERNAL_AUTH)
-#endif  // TALK_SESSION_MEDIA_EXTERNAL_HMAC_H_
+#endif  // WEBRTC_PC_EXTERNALHMAC_H_