Loosen FirstMeaningfulPaint UMA network-idle heuristics

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 58c39ea6f7879f907864f3a4f87a5066f219dea7..9f9bea6b0929b06b9eba1b8d40edaeb8fadadfc6 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -44554,6 +44554,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram
+    name="PageLoad.Experimental.PaintTiming.NetworkStateAtFirstMeaningfulPaint"
+    enum="NetworkStateAtFirstMeaningfulPaint">
+  <owner>ksakamoto@chromium.org</owner>
+  <summary>
+    Records network activity status when the first meaningful paint happened.
+  </summary>
+</histogram>
+
+<histogram
     name="PageLoad.Experimental.PaintTiming.ParseStartToFirstMeaningfulPaint"
     units="ms">
   <owner>ksakamoto@chromium.org</owner>
@@ -100950,6 +100959,11 @@ value.
   <int value="20" label="PIN_MISSING"/>
 </enum>
 
+<enum name="NetworkStateAtFirstMeaningfulPaint" type="int">
+  <int value="0" label="Network Active"/>
+  <int value="1" label="Network 2-quiet"/>
+</enum>
+
 <enum name="NetworkTechnology" type="int">
   <int value="0" label="Cellular"/>
   <int value="1" label="Ethernet"/>