Integrate UI with authentication flow.

blimp/client/core/android/java/src/org/chromium/blimp/core/settings/BlimpPreferencesDelegate.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.core.settings;
+
+import org.chromium.blimp_public.BlimpClientContextDelegate;
+
+/**
+ * BlimpPreferencesDelegate provides functionalities needed by preferences UX.
+ */
+public interface BlimpPreferencesDelegate {
+    /**
+     * @return The {@link BlimpClientContextDelegate} that contains embedder functionalities.
+     */
+    BlimpClientContextDelegate getDelegate();
+
+    /**
+     * Initialize setting page.
+     * Setup all helper objects that the setting page needs, such as IdentitySource in native code.
+     */
+    void initSettingsPage(AboutBlimpPreferences preferences);
+
+    /**
+     * Start authentication flow and connection to engine.
+     */
+    void connect();
+}