system_wrappers: Fix include header guards.

webrtc/system_wrappers/include/tick_util.h

Index: webrtc/system_wrappers/include/tick_util.h
diff --git a/webrtc/system_wrappers/include/tick_util.h b/webrtc/system_wrappers/include/tick_util.h
index e0f5861fa72c5a584720fa606433c661cc1b1da2..46d62cce58653ad665dd7ef4d6d0904f075fc00e 100644
--- a/webrtc/system_wrappers/include/tick_util.h
+++ b/webrtc/system_wrappers/include/tick_util.h
@@ -11,8 +11,8 @@
 // System independant wrapper for polling elapsed time in ms and us.
 // The implementation works in the tick domain which can be mapped over to the
 // time domain.
-#ifndef WEBRTC_SYSTEM_WRAPPERS_INTERFACE_TICK_UTIL_H_
-#define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_TICK_UTIL_H_
+#ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_TICK_UTIL_H_
+#define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_TICK_UTIL_H_
 
 #if _WIN32
 // Note: The Windows header must always be included before mmsystem.h
@@ -294,4 +294,4 @@ inline TickInterval& TickInterval::operator-=(const TickInterval& rhs) {
 
 }  // namespace webrtc
 
-#endif  // WEBRTC_SYSTEM_WRAPPERS_INTERFACE_TICK_UTIL_H_
+#endif  // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_TICK_UTIL_H_