Enforce FirstContentfulPaint <= FirstMeaningfulPaint

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

Index: third_party/WebKit/Source/core/paint/FirstMeaningfulPaintDetectorTest.cpp
diff --git a/third_party/WebKit/Source/core/paint/FirstMeaningfulPaintDetectorTest.cpp b/third_party/WebKit/Source/core/paint/FirstMeaningfulPaintDetectorTest.cpp
index b28b460f85ef86d715936af54fdb218d3b279eff..842d2731b0604d96e2da5a3b072ac73c9e1196ee 100644
--- a/third_party/WebKit/Source/core/paint/FirstMeaningfulPaintDetectorTest.cpp
+++ b/third_party/WebKit/Source/core/paint/FirstMeaningfulPaintDetectorTest.cpp
@@ -116,4 +116,14 @@ TEST_F(FirstMeaningfulPaintDetectorTest,
   EXPECT_NE(paintTiming().firstMeaningfulPaint(), 0.0);
 }
 
+TEST_F(FirstMeaningfulPaintDetectorTest,
+       FirstMeaningfulPaintShouldNotBeBeforeFirstContentfulPaint) {
+  paintTiming().markFirstPaint();
+  simulateLayoutAndPaint(10);
+  paintTiming().markFirstContentfulPaint();
+  simulateNetworkStable();
+  EXPECT_GE(paintTiming().firstMeaningfulPaint(),
+            paintTiming().firstContentfulPaint());
+}
+
 }  // namespace blink