Assert event timestamp to be monotonic and not from future

third_party/WebKit/Source/wtf/CurrentTime.h

Index: third_party/WebKit/Source/wtf/CurrentTime.h
diff --git a/third_party/WebKit/Source/wtf/CurrentTime.h b/third_party/WebKit/Source/wtf/CurrentTime.h
index cfddcbea114c1e46c427a8e2a087298a2f0252ef..d1f97c1f1e9148b0ec8150f7433aa917f84f79e6 100644
--- a/third_party/WebKit/Source/wtf/CurrentTime.h
+++ b/third_party/WebKit/Source/wtf/CurrentTime.h
@@ -59,10 +59,17 @@ inline double monotonicallyIncreasingTimeMS()
 
 using TimeFunction = double (*)();
 
-// Make all the time functions (currentTime(), monotonicallyIncreasingTime(), systemTraceTime()) return the result
-// of the supplied function. Returns the pointer to the old time function. For both setting and getting, nullptr means
-// using the default timing function returning the actual time.
-WTF_EXPORT TimeFunction setTimeFunctionsForTesting(TimeFunction);
+// Make |currentTime()| function return the result of the supplied function.
+// Returns the pointer to the old time function. For both setting and getting,
+// nullptr means using the default timing function returning the actual time.
+WTF_EXPORT TimeFunction setCurrentTimeFunctionForTesting(TimeFunction);
+
+// Make |monotonicallyIncreasingTime()| function return the result of the
+// supplied function.
+// Returns the pointer to the old time function. For both setting and getting,
+// nullptr means using the default timing function returning the actual time.
+WTF_EXPORT TimeFunction setMonotonicallyIncreasingTimeFunctionForTesting(TimeFunction);
+
 
 } // namespace WTF
 
@@ -71,6 +78,7 @@ using WTF::currentTimeMS;
 using WTF::monotonicallyIncreasingTime;
 using WTF::monotonicallyIncreasingTimeMS;
 using WTF::TimeFunction;
-using WTF::setTimeFunctionsForTesting;
+using WTF::setCurrentTimeFunctionForTesting;
+using WTF::setMonotonicallyIncreasingTimeFunctionForTesting;
 
 #endif // CurrentTime_h