Assert event timestamp to be monotonic and not from future

third_party/WebKit/Source/wtf/CurrentTime.cpp

Index: third_party/WebKit/Source/wtf/CurrentTime.cpp
diff --git a/third_party/WebKit/Source/wtf/CurrentTime.cpp b/third_party/WebKit/Source/wtf/CurrentTime.cpp
index dc64e33663f4e558739a699d96be1a4519a2098d..03f0771c01a2b5c57df941085551b3a72f2cf858 100644
--- a/third_party/WebKit/Source/wtf/CurrentTime.cpp
+++ b/third_party/WebKit/Source/wtf/CurrentTime.cpp
@@ -34,27 +34,36 @@
 
 namespace WTF {
 
-static TimeFunction mockTimeFunctionForTesting = nullptr;
+static TimeFunction mockCurrentTimeFunction = nullptr;
+static TimeFunction mockMonotonicallyIncreasingTimeFunction = nullptr;
 
 double currentTime()
 {
-    if (mockTimeFunctionForTesting)
-        return mockTimeFunctionForTesting();
+    if (mockCurrentTimeFunction)
+        return mockCurrentTimeFunction();
     return base::Time::Now().ToDoubleT();
 }
 
 double monotonicallyIncreasingTime()
 {
-    if (mockTimeFunctionForTesting)
-        return mockTimeFunctionForTesting();
+    if (mockMonotonicallyIncreasingTimeFunction)
+        return mockMonotonicallyIncreasingTimeFunction();
     return base::TimeTicks::Now().ToInternalValue() / static_cast<double>(base::Time::kMicrosecondsPerSecond);
 }
 
-TimeFunction setTimeFunctionsForTesting(TimeFunction newFunction)
+TimeFunction setCurrentTimeFunctionForTesting(TimeFunction newFunction)
 {
-    TimeFunction oldFunction = mockTimeFunctionForTesting;
-    mockTimeFunctionForTesting = newFunction;
+    TimeFunction oldFunction = mockCurrentTimeFunction;
+    mockCurrentTimeFunction = newFunction;
     return oldFunction;
 }
 
+TimeFunction setMonotonicallyIncreasingTimeFunctionForTesting(TimeFunction newFunction)
+{
+    TimeFunction oldFunction = mockMonotonicallyIncreasingTimeFunction;
+    mockMonotonicallyIncreasingTimeFunction = newFunction;
+    return oldFunction;
+}
+
+
 } // namespace WTF