Adding BlimpNavigationController to Tab

blimp/client/public/android/java/src/org/chromium/blimp_public/BlimpClientContext.java

 // Copyright 2016 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.blimp_public;
 
 import android.preference.PreferenceFragment;
 
 import org.chromium.blimp_public.contents.BlimpContents;
 
@@ skipping 10 matching lines @@
      * {@link BlimpContents#destroy()} for destruction of the BlimpContents.
      */
     BlimpContents createBlimpContents();
 
     /**
      * @return If Blimp is supported with this build.
      */
     boolean isBlimpSupported();
 
     /**
+     * @return If Blimp is enabled by the user.
+     */
+    boolean isBlimpEnabled();
+
+    /**
      * Attach blimp settings UI to a {@link PreferenceFragment}
      * @param fragment PreferenceFragment that blimp settings UI attached to.
      * @param callback Chrome layer callbacks that passed to Blimp.
      */
     void attachBlimpPreferences(PreferenceFragment fragment, BlimpSettingsCallbacks callback);
 
     /**
      * Set the {@link BlimpClientContextDelegate}, functions in this interface should be used in
      * Java Blimp code only.
      */
     void setDelegate(BlimpClientContextDelegate delegate);
 
     /**
      * Start authentication flow and connection to engine.
      * This must be called after AccountTrackerService.onSystemAccountsSeedingComplete, since the
      * embedder may asynchronously seed account info to native layer, and revoke all OAuth2 refresh
      * token during the request.
      */
     void connect();
 }