Add new prerender histograms to histograms.xml

R=isherman@chromium.org

Review URL: https://codereview.chromium.org/23707014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@220697 0039d316-1c4b-4281-b951-d872f2087c98

tools/metrics/histograms/histograms.xml

@@ -11998,6 +11998,24 @@ other types of suffix sets.
   </summary>
 </histogram>
 
+<histogram name="Prerender.LocalPredictorLoggedInLookupTime"
+    units="milliseconds">
+  <summary>
+    Time to perform the LoggedIn Lookup for the local predictor. This operation
+    checks whether a user his likely logged into a page that we would like to
+    prerender.
+  </summary>
+</histogram>
+
+<histogram name="Prerender.LocalPredictorServiceLookupTime"
+    units="milliseconds">
+  <summary>
+    Time to perform the Service Lookup for the local predictor. This operation
+    queries a Google service to obtain pages to prerender, as well as whether
+    prerender candidate pages are likely safe for prerendering.
+  </summary>
+</histogram>
+
 <histogram name="Prerender.LocalPredictorTimeUntilUsed" units="milliseconds">
   <summary>
     Time from when a prerendered page is started to when it is first used due to
@@ -12006,6 +12024,14 @@ other types of suffix sets.
   </summary>
 </histogram>
 
+<histogram name="Prerender.LocalPredictorURLLookupTime" units="milliseconds">
+  <summary>
+    Time to perform the URL Lookup for the local predictor. This operation
+    retrieves from the user's local browsing history the URLs corresponding to
+    URLIDs.
+  </summary>
+</histogram>
+
 <histogram name="Prerender.LocalVisitCoreTransition"
     enum="PrerenderLocalVisitCoreTransition">
   <obsolete>
@@ -22371,6 +22397,19 @@ other types of suffix sets.
   <int value="53" label="Issuing prerender, new prerender"/>
   <int value="54" label="Issuing prerender, cancelled old prerender"/>
   <int value="55" label="Continue prerender check fallthrough prerendering"/>
+  <int value="56" label="URL lookup success"/>
+  <int value="57" label="Prerender Service disabled"/>
+  <int value="58" label="Prerender Service issued lookup"/>
+  <int value="59" label="Prerender Service lookup timed out"/>
+  <int value="60" label="Prerender Service received result"/>
+  <int value="61" label="Prerender Service no record for result"/>
+  <int value="62" label="Prerender Service parsed correctly"/>
+  <int value="63" label="Prerender Service parse error"/>
+  <int value="64" label="Prerender Service parse error incorrect JSON"/>
+  <int value="65" label="Prerender Service hinting timed out"/>
+  <int value="66" label="Prerender Service hinting url lookup timed out"/>
+  <int value="67" label="Prerender Service candidate url lookup timed out"/>
+  <int value="68" label="Continue prerender check service whitelist"/>
 </enum>
 
 <enum name="PrerenderLocalVisitCoreTransition" type="int">