Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/hosted/IBrowserConnectionCallback.aidl

+// Copyright 2015 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.chrome.browser.hosted;
+
+import android.os.Bundle;
+
+/**
+ * Interface for the client-provided callback on user navigation.
+ */
+interface IBrowserConnectionCallback {
+    /**
+     * To be called when the user triggers an external navigation.
+     *
+     * @param sessionId As returned by {@link IBrowserConnectionService#newSession}.
+     * @param url URL the user has navigated to.
+     * @param extras Reserved for future use.
+     */
+    void onUserNavigation(long sessionId, String url, in Bundle extras);
+}