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 35c3c071a86a9d8d52a18c6df008a67fe2997faa..216cee21b18889ba9a592525967cb8c258079484 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -8895,9 +8895,8 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 <histogram name="Extensions.FeatureProviderStaticInitTime" units="milliseconds">
   <owner>rkaplow@chromium.org</owner>
   <summary>
-    The amount of time that elapsed during
-    extensions::FeatureProvider::Static. Only measured while in the browser
-    process.
+    The amount of time that elapsed during extensions::FeatureProvider::Static.
+    Only measured while in the browser process.
   </summary>
 </histogram>
 
@@ -11205,6 +11204,16 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="History.UpdateTopSitesOnDBThreadTime" units="milliseconds">
+  <owner>yiyaoliu@chromium.org</owner>
+  <summary>
+    The amount of time for function
+    history::TopSitesBackend::UpdateTopSitesOnDBThread to execute. Excludes the
+    case where local TopSitesDatabase db_ is unavailable, i.e. where the update
+    doesn't really happen.
+  </summary>
+</histogram>
+
 <histogram name="HistoryPage.ClickPosition">
   <owner>rpop@google.com</owner>
   <summary>
@@ -19607,8 +19616,8 @@ Therefore, the affected-histogram name has to have at least one dot in it.
     enum="QuicSessionLocations">
   <owner>rch@chromium.org</owner>
   <summary>
-    The location in quic_client_session.cc where a session is unexpectedly
-    not going away.
+    The location in quic_client_session.cc where a session is unexpectedly not
+    going away.
   </summary>
 </histogram>