Save image should download the original image when Data Saver is enabled.

chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ChromeContextMenuItemDelegate.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.chrome.browser.Tab;
 import org.chromium.content.browser.ContentViewCore;
 import org.chromium.content_public.common.Referrer;
 
@@ skipping 12 matching lines @@
      */
     boolean isIncognitoSupported();
 
     /**
      * @return Whether or not the context menu should give the user the chance to show the original
      *         image.
      */
     boolean canLoadOriginalImage();
 
     /**
+     * Returns whether or not the Data Reduction Proxy is enabled for input url.
+     * @param url Input url to check for the Data Reduction Proxy setting.
+     * @return true if the Data Reduction Proxy is enabled for the url.
+    */
+    boolean isDataReductionProxyEnabledForURL(String url);
+
+    /**
      * Called when the context menu is trying to start a download.
      * @param url Url of the download item.
      * @param isLink Whether or not the download is a link (as opposed to an image/video).
      * @return       Whether or not a download should actually be started.
      */
     boolean startDownload(String url, boolean isLink);
 
     /**
      * Called when the {@code url} should be opened in a new tab with the same incognito state as
      * the current {@link Tab}.
@@ skipping 46 matching lines @@
     /**
      * Called when a search by image should be performed in a new tab.
      */
     void onSearchByImageInNewTab();
 
    /**
     * @return page url.
     */
     String getPageUrl();
 }