Adding UMA metric to record the type of suggestion displayed on the NTP's Most Visited section.

chrome/browser/resources/local_ntp/most_visited_util.js

Index: chrome/browser/resources/local_ntp/most_visited_util.js
diff --git a/chrome/browser/resources/local_ntp/most_visited_util.js b/chrome/browser/resources/local_ntp/most_visited_util.js
index 8a4ea9b3bba9d2e2fb8e84401b207e80ccd42434..efdf01e3029f54cc3ea2e46010ceebede7cd474d 100644
--- a/chrome/browser/resources/local_ntp/most_visited_util.js
+++ b/chrome/browser/resources/local_ntp/most_visited_util.js
@@ -29,7 +29,9 @@ var NTP_LOGGING_EVENT_TYPE = {
   NTP_FALLBACK_THUMBNAIL_REQUESTED: 3,
   // The primary thumbnail image failed to load and caused us to use the
   // secondary thumbnail as a fallback.
-  NTP_FALLBACK_THUMBNAIL_USED: 4
+  NTP_FALLBACK_THUMBNAIL_USED: 4,
+  // We got a suggestion coming from the server.

[Mathieu, 2013/11/22 19:58:19]

nit: Remove reference to "We" here and below

[beaudoin, 2013/11/22 20:09:35]

Done.

+  NTP_SERVER_SIDE_SUGGESTION: 5
 };
 
 
@@ -163,6 +165,9 @@ function fillMostVisited(location, fill) {
     data.direction = params.di || '';
     data.domain = params.dom || '';
     data.ping = params.ping || '';
+    // Log the fact that we got a server suggestion
+    var ntpApiHandle = chrome.embeddedSearch.newTabPage;
+    ntpApiHandle.logEvent(NTP_LOGGING_EVENT_TYPE.NTP_SERVER_SIDE_SUGGESTION);
   } else {
     var apiHandle = chrome.embeddedSearch.searchBox;
     data = apiHandle.getMostVisitedItemData(params.rid);