Blimp settings UI integration for Chrome, everything still lives in Blimp.

blimp/client/app/android/javatests/src/org/chromium/blimp/core/settings/MockPreferences.java

Index: blimp/client/app/android/javatests/src/org/chromium/blimp/core/settings/MockPreferences.java
diff --git a/blimp/client/app/android/javatests/src/org/chromium/blimp/core/settings/MockPreferences.java b/blimp/client/app/android/javatests/src/org/chromium/blimp/core/settings/MockPreferences.java
new file mode 100644
index 0000000000000000000000000000000000000000..8128094f6d50d4e729cff7bd1089817425241a07
--- /dev/null
+++ b/blimp/client/app/android/javatests/src/org/chromium/blimp/core/settings/MockPreferences.java
@@ -0,0 +1,48 @@
+// 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 android.app.Activity;
+import android.app.FragmentManager;
+import android.os.Bundle;
+import android.preference.PreferenceFragment;
+import android.preference.PreferenceScreen;
+
+/**
+ * Activity to hold {@link MockMainPreferences}.
+ */
+public class MockPreferences extends Activity {
+
+    public static final String FRAGMENT_TAG = "TestMainPref";
+
+    // Mock {@link MainPreferences} in Clank, this is a PreferenceFragment that holds a list of
+    // sub preferences items, including AboutBlimpPreferences.
+    static class MockMainPreferences extends PreferenceFragment {
+        @Override
+        public void onCreate(Bundle savedInstanceState) {
+            super.onCreate(savedInstanceState);
+
+            // Create a PreferenceScreen in runtime, since the mock class don't load any XML
+            // resource.
+            PreferenceScreen screen = getPreferenceManager().createPreferenceScreen(getActivity());
+            setPreferenceScreen(screen);
+        }
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // Attach the {@link MockMainPreferences} to this activity.
+        FragmentManager manager = getFragmentManager();
+        manager.beginTransaction().add(new MockMainPreferences(), FRAGMENT_TAG)
+            .commitAllowingStateLoss();
+        manager.executePendingTransactions();
+    }
+
+    public PreferenceFragment getMainFragment() {
+        return (PreferenceFragment) getFragmentManager().findFragmentByTag(FRAGMENT_TAG);
+    }
+}