Re-submit of AppLink implementation.

chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegateImpl.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.externalnav;
 
 import android.Manifest.permission;
 import android.app.Activity;
 import android.content.Context;
 import android.content.DialogInterface;
@@ skipping 11 matching lines @@
 import android.provider.Telephony;
 import android.support.v7.app.AlertDialog;
 import android.text.TextUtils;
 import android.util.Log;
 
 import org.chromium.base.ApplicationState;
 import org.chromium.base.ApplicationStatus;
 import org.chromium.base.PathUtils;
 import org.chromium.base.ThreadUtils;
 import org.chromium.chrome.R;
+import org.chromium.chrome.browser.AppLinkHandler;
 import org.chromium.chrome.browser.ChromeActivity;
+import org.chromium.chrome.browser.ChromeApplication;
 import org.chromium.chrome.browser.IntentHandler;
 import org.chromium.chrome.browser.document.ChromeLauncherActivity;
 import org.chromium.chrome.browser.externalnav.ExternalNavigationHandler.OverrideUrlLoadingResult;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.util.FeatureUtilities;
 import org.chromium.chrome.browser.util.UrlUtilities;
 import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.content_public.common.Referrer;
 import org.chromium.ui.base.PageTransition;
 import org.chromium.ui.base.WindowAndroid;
@@ skipping 420 matching lines @@
             throw e;
         }
     }
 
     private void closeTab(Tab tab) {
         Context context = tab.getWindowAndroid().getContext().get();
         if (context instanceof ChromeActivity) {
             ((ChromeActivity) context).getTabModelSelector().closeTab(tab);
         }
     }
+
+    @Override
+    public boolean maybeDelegateToAppLink(Intent intent) {
+        return AppLinkHandler.getInstance((ChromeApplication)
+                ApplicationStatus.getLastTrackedFocusedActivity().getApplication()).handleIntent(
+                        getAvailableContext(), intent, false);
+    }
 }