[NTPSnippets] Switch from TickClock to Clock for storing the last background fetched time.

chrome/browser/resources/snippets_internals.js

Index: chrome/browser/resources/snippets_internals.js
diff --git a/chrome/browser/resources/snippets_internals.js b/chrome/browser/resources/snippets_internals.js
index 3cf3560d2ff095c54d029fce7078523c79b5a0c4..7be658a039ea1605cef9046d4eb92cecac8d5fcd 100644
--- a/chrome/browser/resources/snippets_internals.js
+++ b/chrome/browser/resources/snippets_internals.js
@@ -33,6 +33,11 @@ cr.define('chrome.SnippetsInternals', function() {
       event.preventDefault();
     });
 
+    $('background-fetch-button').addEventListener('click', function(event) {
+      chrome.send('fetchRemoteSuggestionsInTheBackground');
+      event.preventDefault();
+    });
+
     window.addEventListener('focus', refreshContent);
     window.setInterval(refreshContent, 1000);
 
@@ -108,6 +113,12 @@ cr.define('chrome.SnippetsInternals', function() {
     receiveProperty('avg-time-to-use', timeToUse);
   }
 
+  function receiveLastRemoteSuggestionsBackgroundFetchTime(
+      lastRemoteSuggestionsBackgroundFetchTime) {
+    receiveProperty('last-background-fetch-time-label',
+        lastRemoteSuggestionsBackgroundFetchTime);
+  }
+
   function downloadJson(json) {
     // Redirect the browser to download data in |json| as a file "snippets.json"
     // (Setting Content-Disposition: attachment via a data: URL is not possible;
@@ -157,6 +168,8 @@ cr.define('chrome.SnippetsInternals', function() {
     receiveContentSuggestions: receiveContentSuggestions,
     receiveJson: receiveJson,
     receiveClassification: receiveClassification,
+    receiveLastRemoteSuggestionsBackgroundFetchTime:
+        receiveLastRemoteSuggestionsBackgroundFetchTime,
   };
 });