Instant apps: cleanup an unused parameter.

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 533 matching lines @@
         return PDF_EXTENSION.equals(fileExtension);
     }
 
     @Override
     public void maybeRecordAppHandlersInIntent(Intent intent, List<ResolveInfo> infos) {
         intent.putExtra(IntentHandler.EXTRA_EXTERNAL_NAV_PACKAGES,
                 getSpecializedHandlersWithFilter(infos, null));
     }
 
     @Override
-    public boolean isSerpReferrer(String referrerUrl, Tab tab) {
-        if (tab == null || tab.getWebContents() == null) {
-            return false;
-        }
+    public boolean isSerpReferrer(Tab tab) {
+        if (tab == null || tab.getWebContents() == null) return false;
 
         NavigationController nController = tab.getWebContents().getNavigationController();
         int index = nController.getLastCommittedEntryIndex();
         if (index == -1) return false;
 
         NavigationEntry entry = nController.getEntryAtIndex(index);
         if (entry == null) return false;
 
         return UrlUtilities.nativeIsGoogleSearchUrl(entry.getUrl());
     }
 
     @Override
     public boolean maybeLaunchInstantApp(Tab tab, String url, String referrerUrl,
             boolean isIncomingRedirect) {
         if (tab == null || tab.getWebContents() == null) return false;
 
         InstantAppsHandler handler = InstantAppsHandler.getInstance();
         Intent intent = tab.getTabRedirectHandler() != null
                 ? tab.getTabRedirectHandler().getInitialIntent() : null;
         // TODO(mariakhomenko): consider also handling NDEF_DISCOVER action redirects.
         if (isIncomingRedirect && intent != null && intent.getAction() == Intent.ACTION_VIEW) {
             // Set the URL the redirect was resolved to for checking the existence of the
             // instant app inside handleIncomingIntent().
             Intent resolvedIntent = new Intent(intent);
             resolvedIntent.setData(Uri.parse(url));
             return handler.handleIncomingIntent(getAvailableContext(), resolvedIntent,
                     ChromeLauncherActivity.isCustomTabIntent(resolvedIntent));
         } else if (!isIncomingRedirect) {
             // Check if the navigation is coming from SERP and skip instant app handling.
-            if (isSerpReferrer(referrerUrl, tab)) return false;
+            if (isSerpReferrer(tab)) return false;
             return handler.handleNavigation(
                     getAvailableContext(), url,
                     TextUtils.isEmpty(referrerUrl) ? null : Uri.parse(referrerUrl),
                     tab.getWebContents());
         }
         return false;
     }
 
     /**
      * Dispatches the intent through a proxy activity, so that startActivityForResult can be used
      * and the intent recipient can verify the caller.
      * @param intent The bare intent we were going to send.
      */
     protected void dispatchAuthenticatedIntent(Intent intent) {
         Intent proxyIntent = new Intent(Intent.ACTION_MAIN);
         proxyIntent.setClass(getAvailableContext(), AuthenticatedProxyActivity.class);
         intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
         proxyIntent.putExtra(AuthenticatedProxyActivity.AUTHENTICATED_INTENT_EXTRA, intent);
         getAvailableContext().startActivity(proxyIntent);
     }
 }