Kick incognito tabs from CCTs to tabbed mode.

chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.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;
 
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.SearchManager;
@@ skipping 1411 matching lines @@
                         OfflinePageUtils.saveBookmarkOffline(newBookmarkId, tabToBookmark);
                     }
                 } else {
                     bookmarkModel.destroy();
                 }
             }
         });
     }
 
     /**
+     * @return Whether the tab models have been fully initialized.
+     */
+    public boolean areTabModelsInitialized() {
+        return mTabModelsInitialized;
+    }
+
+    /**
      * {@link TabModelSelector} no longer implements TabModel.  Use getTabModelSelector() or
      * getCurrentTabModel() depending on your needs.
      * @return The {@link TabModelSelector}, possibly null.
      */
     public TabModelSelector getTabModelSelector() {
         if (!mTabModelsInitialized) {
             throw new IllegalStateException(
                     "Attempting to access TabModelSelector before initialization");
         }
         return mTabModelSelector;
@@ skipping 688 matching lines @@
      * draw over VR contents should be hidden in this call.
      */
     public void onEnterVR() {}
 
     /**
      * Called when VR mode using this activity is exited. Any state set for VR should be restored
      * in this call, including showing 2D UI that was hidden.
      */
     public void onExitVR() {}
 }