Integrate UI with authentication flow.

blimp/client/core/android/java/src/org/chromium/blimp/core/settings/BlimpPreferencesDelegate.java

Index: blimp/client/core/android/java/src/org/chromium/blimp/core/settings/BlimpPreferencesDelegate.java
diff --git a/blimp/client/core/android/java/src/org/chromium/blimp/core/settings/BlimpPreferencesDelegate.java b/blimp/client/core/android/java/src/org/chromium/blimp/core/settings/BlimpPreferencesDelegate.java
new file mode 100644
index 0000000000000000000000000000000000000000..4c25c3ac5caa0e589d30d97035c429eb79c9cf7d
--- /dev/null
+++ b/blimp/client/core/android/java/src/org/chromium/blimp/core/settings/BlimpPreferencesDelegate.java
@@ -0,0 +1,28 @@
+// 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();
+}