[Sync] Adding revisit logic for typed URLs.

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 6c9afe14ee3818de26e4655012427f0ffc5bb902..d3ef3a74a6872e0572f874b1a10f7124c9a317a3 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -45657,6 +45657,33 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>Transition type that didn't match a synced tab.</summary>
 </histogram>
 
+<histogram name="Sync.PageRevisitTypedUrlDuration" units="milliseconds">
+  <owner>skym@chromium.org</owner>
+  <summary>
+    The client side execution time to check for revisits with typed URL data.
+  </summary>
+</histogram>
+
+<histogram name="Sync.PageRevisitTypedUrlMatchAge" units="minutes">
+  <owner>skym@chromium.org</owner>
+  <summary>
+    Difference in time between finding the match and the last time this URL was
+    typed on a foreign client.
+  </summary>
+</histogram>
+
+<histogram name="Sync.PageRevisitTypedUrlMatchTransition"
+    units="PageVisitTransitionType">
+  <owner>skym@chromium.org</owner>
+  <summary>Transition type that didn't match a typed URL.</summary>
+</histogram>
+
+<histogram name="Sync.PageRevisitTypedUrlMissTransition"
+    units="PageVisitTransitionType">
+  <owner>skym@chromium.org</owner>
+  <summary>Transition type that matched a typed URL.</summary>
+</histogram>
+
 <histogram name="Sync.PartiallySyncedTypes">
   <owner>zea@chromium.org</owner>
   <summary>