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

content/public/browser/android/download_controller_android.h

Index: content/public/browser/android/download_controller_android.h
diff --git a/content/public/browser/android/download_controller_android.h b/content/public/browser/android/download_controller_android.h
index 65da4b82f8f1e9c915f339ada0360872d9f4d1c2..47398368c56641a8e4fda1031b76ee60a923afaa 100644
--- a/content/public/browser/android/download_controller_android.h
+++ b/content/public/browser/android/download_controller_android.h
@@ -32,7 +32,7 @@ class CONTENT_EXPORT DownloadControllerAndroid {
   // Called when a download is initiated by context menu.
   virtual void StartContextMenuDownload(
       const ContextMenuParams& params, WebContents* web_contents,
-      bool is_link) = 0;
+      bool is_link, const std::string& headers) = 0;
 
   // Called when a dangerous download item is verified or rejected.
   virtual void DangerousDownloadValidated(