EQT: Record the max queueing time from navigation start to navigation away

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 3cb4e1df495072edb9f3a50c9caa48d1d4a48e68..26a9490fac6fe3f66e945f67b970238766f0905b 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -59062,6 +59062,16 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram
+    name="RendererScheduler.MaxExpectedTaskQueueingDurationDuringNavigation"
+    units="ms">
+  <owner>maxlg@chromium.org</owner>
+  <summary>
+    The single maximum estimated queueing duration between when user start
+    navigation and user navigate away.
+  </summary>
+</histogram>
+
 <histogram name="RendererScheduler.NumberOfTasksPerQueueType"
     enum="RendererSchedulerTaskQueueType">
   <owner>altimin@chromium.org,alexclarke@chromium.org</owner>