Add access count and time-since-accessed histograms to temp storage eviction.

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 c896ac2841cf8dfc0c6cab31f636b38eb9aae5cf..954efec45dafe9dd737b767f0bbe42234d2a8226 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -36679,11 +36679,27 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Quota.EvictedOriginAccessCount">
+  <owner>calamity@chromium.org</owner>
+  <summary>
+    The number of times the evicted origin was accessed. Logged when the origin
+    is evicted.
+  </summary>
+</histogram>
+
 <histogram name="Quota.EvictedOriginsPerHour">
   <owner>tzik@chromium.org</owner>
   <summary>Number of evicted origins in an hour.</summary>
 </histogram>
 
+<histogram name="Quota.EvictedOriginTimeSinceAccess">
+  <owner>calamity@chromium.org</owner>
+  <summary>
+    The time since the evicted origin was last accessed. Logged when the origin
+    is evicted.
+  </summary>
+</histogram>
+
 <histogram name="Quota.EvictionRoundsPerHour">
   <owner>tzik@chromium.org</owner>
   <summary>Number of eviction rounds in an hour.</summary>