Ntp: show AllDismissedItem when all sections have been dismissed.

chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageUma.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.ntp;
 
 import android.os.SystemClock;
 import android.support.annotation.IntDef;
 
 import org.chromium.base.metrics.RecordHistogram;
@@ skipping 31 matching lines @@
     public static final int ACTION_OPENED_MOST_VISITED_ENTRY = 3;
     // User opened a recently closed tab
     public static final int ACTION_OPENED_RECENTLY_CLOSED_ENTRY = 4;
     // User opened a bookmark
     public static final int ACTION_OPENED_BOOKMARK = 5;
     // User opened a foreign session (from recent tabs section)
     public static final int ACTION_OPENED_FOREIGN_SESSION = 6;
     // User navigated to the webpage for a snippet shown on the NTP.
     public static final int ACTION_OPENED_SNIPPET = 7;
     // User clicked on an interest item.
     public static final int ACTION_CLICKED_INTEREST = 8;

[Marc Treib, 2016/10/11 12:18:14]

Unrelated, but: This is unused. Maybe remove it, or at least mark it as
deprecated or something?

[Michael van Ouwerkerk, 2016/10/11 15:21:31]

I added a TODO for removing it and cleaning up histograms.xml accordingly.

     // User clicked on the "learn more" link in the footer.
     public static final int ACTION_CLICKED_LEARN_MORE = 9;
+    // User clicked on the "Refresh" button in the "all dismissed" state.
+    public static final int ACTION_CLICKED_ALL_DISMISSED_REFRESH = 10;
     // The number of possible actions
-    private static final int NUM_ACTIONS = 10;
+    private static final int NUM_ACTIONS = 11;
 
     // User navigated to a page using the omnibox.
     private static final int RAPPOR_ACTION_NAVIGATED_USING_OMNIBOX = 0;
     // User navigated to a page using one of the suggested tiles.
     public static final int RAPPOR_ACTION_VISITED_SUGGESTED_TILE = 1;
 
     // Regular NTP impression (usually when a new tab is opened)
     public static final int NTP_IMPRESSION_REGULAR = 0;
 
     // Potential NTP impressions (instead of blank page if no tab is open)
@@ skipping 200 matching lines @@
         private void endRecording(Tab removeObserverFromTab) {
             if (removeObserverFromTab != null) removeObserverFromTab.removeObserver(this);
             RecordUserAction.record("MobileNTP.Snippets.VisitEnd");
             long visitTimeMs = SystemClock.elapsedRealtime() - mStartTimeMs;
             RecordHistogram.recordLongTimesHistogram(
                     "NewTabPage.Snippets.VisitDuration", visitTimeMs, TimeUnit.MILLISECONDS);
             SnippetsBridge.onSuggestionTargetVisited(mCategory, visitTimeMs);
         }
     }
 }