ntp4: record app launch source

chrome/browser/resources/ntp4/recently_closed.js

Index: chrome/browser/resources/ntp4/recently_closed.js
diff --git a/chrome/browser/resources/ntp4/recently_closed.js b/chrome/browser/resources/ntp4/recently_closed.js
index 04750a29b7b2d829db180cf971b2a108c8998438..71d332e47cae4b2ddc38b3dc1e57a5a0dc1ce3f9 100644
--- a/chrome/browser/resources/ntp4/recently_closed.js
+++ b/chrome/browser/resources/ntp4/recently_closed.js
@@ -91,7 +91,12 @@ cr.define('ntp4', function() {
 
       function onActivate(e) {
         // TODO(estade): don't convert to string.
+        chrome.send('recordAppLaunchByURL',
+                    [data.url, String(ntp4.APP_LAUNCH.NTP_RECENTLY_CLOSED)]);
+        // TODO(estade): don't convert to string.
         chrome.send('reopenTab', [String(data.sessionId)]);
+        // We are likely deleted by this point!
+
         e.preventDefault();
       }
       a.addEventListener('activate', onActivate);