[Home] Ensure incognito tab model is created when NTP opened

chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModel.java

 // Copyright 2014 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.tabmodel;
 
 import org.chromium.chrome.browser.profiles.Profile;
 import org.chromium.chrome.browser.tab.Tab;
 
 /**
@@ skipping 192 matching lines @@
     void addTab(Tab tab, int index, TabLaunchType type);
 
     /**
      * Removes the given tab from the model without destroying it. The tab should be inserted into
      * another model to avoid leaking as after this the link to the old Activity will be broken.
      * @param tab The tab to remove.
      */
     void removeTab(Tab tab);
 
     /**
+     * Indicates that a new tab may be created soon. Allows the model to initialize anything
+     * necessary for the creation of a tab or perform cleanup if a new tab may no longer be created
+     * soon.
+     * @param mayAddTab Whether a new tab may be created soon.
+     */
+    public void setMayAddTab(boolean mayAddTab);

[Ted C, 2017/05/23 23:50:17]

bikesheading...I like something like setIsPendingTabAdd or something like
that...for no good reason

[Theresa, 2017/05/24 16:52:08]

Done.

+
+    /**
      * Subscribes a {@link TabModelObserver} to be notified about changes to this model.
      * @param observer The observer to be subscribed.
      */
     void addObserver(TabModelObserver observer);
 
     /**
      * Unsubscribes a previously subscribed {@link TabModelObserver}.
      * @param observer The observer to be unsubscribed.
      */
     void removeObserver(TabModelObserver observer);
 }