[rtp_rtcp] Lint build/header_guard errors fixed

webrtc/modules/rtp_rtcp/source/mock/mock_rtp_payload_strategy.h

Index: webrtc/modules/rtp_rtcp/source/mock/mock_rtp_payload_strategy.h
diff --git a/webrtc/modules/rtp_rtcp/source/mock/mock_rtp_payload_strategy.h b/webrtc/modules/rtp_rtcp/source/mock/mock_rtp_payload_strategy.h
index 549821f808d9126be668dc9d922b85f5f50ba5b8..e6a76d00f7f45ef856043c4cd6bb4ff9bc830780 100644
--- a/webrtc/modules/rtp_rtcp/source/mock/mock_rtp_payload_strategy.h
+++ b/webrtc/modules/rtp_rtcp/source/mock/mock_rtp_payload_strategy.h
@@ -8,8 +8,8 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_MOCK_MOCK_RTP_PAYLOAD_REGISTRY_H_
-#define WEBRTC_MODULES_RTP_RTCP_SOURCE_MOCK_MOCK_RTP_PAYLOAD_REGISTRY_H_
+#ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_MOCK_MOCK_RTP_PAYLOAD_STRATEGY_H_
+#define WEBRTC_MODULES_RTP_RTCP_SOURCE_MOCK_MOCK_RTP_PAYLOAD_STRATEGY_H_
 
 #include "testing/gmock/include/gmock/gmock.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_payload_registry.h"
@@ -40,4 +40,4 @@ class MockRTPPayloadStrategy : public RTPPayloadStrategy {
 
 }  // namespace webrtc
 
-#endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_MOCK_MOCK_RTP_PAYLOAD_REGISTRY_H_
+#endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_MOCK_MOCK_RTP_PAYLOAD_STRATEGY_H_