Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/tab/AuthenticatorNavigationInterceptor.java

+// 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.tab;
+
+/**
+ * Handles intercepting navigation requests for an external authenticator application.
+ */
+public interface AuthenticatorNavigationInterceptor {
+    /**
+     * To be called by a Tab to check whether the passed in URL, which is about to be loaded,
+     * should be processed by an external Authenticator application.
+     *
+     * @param url the URL about to be loaded in the tab
+     * @return True if the URL has been handled by the Authenticator, false if it hasn't and
+     *         should be processed normally by the Tab.
+     */
+    boolean handleAuthenticatorUrl(String url);
+}