Android: support http referrers for context menu navigations.

chrome/android/java/src/org/chromium/chrome/browser/contextmenu/EmptyChromeContextMenuItemDelegate.java

 // Copyright 2013 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.contextmenu;
 
+import org.chromium.content_public.Referrer;
+
 /**
  * An empty implementation of {@link ChromeContextMenuItemDelegate} to make overriding subsets of
  * the delegate methods easier.
  */
 public class EmptyChromeContextMenuItemDelegate implements ChromeContextMenuItemDelegate {
     @Override
     public boolean isIncognito() {
         return false;
     }
 
     @Override
     public boolean isIncognitoSupported() {
         return false;
     }
 
     @Override
     public boolean canLoadOriginalImage() {
         return false;
     }
 
     @Override
     public boolean startDownload(boolean isLink) {
         return false;
     }
 
     @Override
-    public void onOpenInNewTab(String url) {
+    public void onOpenInNewTab(String url, Referrer referrer) {
     }
 
     @Override
     public void onOpenInNewIncognitoTab(String url) {
     }
 
     @Override
-    public void onOpenImageUrl(String url) {
+    public void onOpenImageUrl(String url, Referrer referrer) {
     }
 
     @Override
-    public void onOpenImageInNewTab(String url) {
+    public void onOpenImageInNewTab(String url, Referrer referrer) {
     }
 
     @Override
     public void onSaveToClipboard(String text, boolean isUrl) {
     }
 
     @Override
     public void onSaveImageToClipboard(String url) {
     }
 
     @Override
     public void onSearchByImageInNewTab() {
     }
-}
+}