Assert event timestamp to be monotonic and not from future

third_party/WebKit/Source/core/paint/FirstMeaningfulPaintDetectorTest.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/paint/FirstMeaningfulPaintDetector.h"
 
 #include "core/paint/PaintTiming.h"
 #include "core/testing/DummyPageHolder.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 class FirstMeaningfulPaintDetectorTest : public testing::Test {
 protected:
     void SetUp() override
     {
         m_dummyPageHolder = DummyPageHolder::create(IntSize(800, 600));
         s_timeElapsed = 0.0;
-        m_originalTimeFunction = setTimeFunctionsForTesting(returnMockTime);
+        m_originalTimeFunction = setMonotonicallyIncreasingTimeFunctionForTesting(returnMockTime);
     }
 
     void TearDown() override
     {
-        setTimeFunctionsForTesting(m_originalTimeFunction);
+        setMonotonicallyIncreasingTimeFunctionForTesting(m_originalTimeFunction);
     }
 
     Document& document() { return m_dummyPageHolder->document(); }
     PaintTiming& paintTiming() { return PaintTiming::from(document()); }
     FirstMeaningfulPaintDetector& detector() { return paintTiming().firstMeaningfulPaintDetector(); }
 
     void simulateLayoutAndPaint(int newElements)
     {
         StringBuilder builder;
         for (int i = 0; i < newElements; i++)
@@ skipping 57 matching lines @@
     paintTiming().markFirstPaint();
     simulateLayoutAndPaint(10);
     double afterLayout1 = monotonicallyIncreasingTime();
     simulateLayoutAndPaint(1);
     simulateNetworkStable();
     EXPECT_GT(paintTiming().firstMeaningfulPaint(), paintTiming().firstPaint());
     EXPECT_LT(paintTiming().firstMeaningfulPaint(), afterLayout1);
 }
 
 } // namespace blink