Integrate UI with authentication flow.

blimp/client/core/android/java/src/org/chromium/blimp/core/common/BlimpClientContextInternal.java

Index: blimp/client/core/android/java/src/org/chromium/blimp/core/common/BlimpClientContextInternal.java
diff --git a/blimp/client/core/android/java/src/org/chromium/blimp/core/common/BlimpClientContextInternal.java b/blimp/client/core/android/java/src/org/chromium/blimp/core/common/BlimpClientContextInternal.java
new file mode 100644
index 0000000000000000000000000000000000000000..71277e638e78bb9c43146442e84bff7dbb1bb429
--- /dev/null
+++ b/blimp/client/core/android/java/src/org/chromium/blimp/core/common/BlimpClientContextInternal.java
@@ -0,0 +1,30 @@
+// 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.common;
+
+import org.chromium.blimp_public.BlimpClientContextDelegate;
+
+/**
+ * BlimpClientContextInternal is a Blimp internal interface used for decoupling internal build
+ * components from blimp/client/core/context target.
+ * This interface can depends on any Blimp targets except context_java.
+ *
+ * For example, classes can't depends on BlimpClientContextImpl can get the
+ * {@link BlimpClientContextDelegate} through this interface.
+ */
+public interface BlimpClientContextInternal {

[David Trainor- moved to gerrit, 2016/08/29 05:12:24]

The Java AboutBlimpPreferences class still uses BlimpClientContext directly. 
Would it make more sense to pass a BlimpPreferencesDelegate or
BlimpPreferencesClient or something that BlimpClientContext implements and
passes into the settings screen?

[xingliu, 2016/08/30 04:47:42]

Changed it to 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.
+     *
+     * @param nativeBlimpSettingsAndroid Native pointer of AboutBlimpPreferences.
+     */
+    void initSettingsPage(long nativeBlimpSettingsAndroid);
+}