Improve FirstMeaningfulPaintDetectorTest's timer tests

third_party/WebKit/Source/core/paint/FirstMeaningfulPaintDetector.h

Index: third_party/WebKit/Source/core/paint/FirstMeaningfulPaintDetector.h
diff --git a/third_party/WebKit/Source/core/paint/FirstMeaningfulPaintDetector.h b/third_party/WebKit/Source/core/paint/FirstMeaningfulPaintDetector.h
index c04d9da72ccebb5934b916b7451dd855ab9e3a03..d9733eb398d251f62de4140b6dd2c0f6a3494213 100644
--- a/third_party/WebKit/Source/core/paint/FirstMeaningfulPaintDetector.h
+++ b/third_party/WebKit/Source/core/paint/FirstMeaningfulPaintDetector.h
@@ -53,6 +53,11 @@ class CORE_EXPORT FirstMeaningfulPaintDetector
  private:
   friend class FirstMeaningfulPaintDetectorTest;
 
+  // The page is n-quiet if there are no more than n active network requests for
+  // this duration of time.
+  static constexpr double kNetwork2QuietWindowSeconds = 3;
+  static constexpr double kNetwork0QuietWindowSeconds = 0.5;
+
   Document* document();
   int activeConnections();
   void setNetworkQuietTimers(int activeConnections);