Context menu item to view original image when Data Saver is being used.

components/renderer_context_menu/render_view_context_menu_base.cc

 // Copyright 2014 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.
 
 #include "components/renderer_context_menu/render_view_context_menu_base.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 360 matching lines @@
 RenderFrameHost* RenderViewContextMenuBase::GetRenderFrameHost() {
   return RenderFrameHost::FromID(render_process_id_, render_frame_id_);
 }
 
 // Controller functions --------------------------------------------------------
 
 void RenderViewContextMenuBase::OpenURL(
     const GURL& url, const GURL& referring_url,
     WindowOpenDisposition disposition,
     ui::PageTransition transition) {
+  OpenURLWithExtraHeaders(url, referring_url, disposition, transition, "");
+}
+
+void RenderViewContextMenuBase::OpenURLWithExtraHeaders(
+    const GURL& url,
+    const GURL& referring_url,
+    WindowOpenDisposition disposition,
+    ui::PageTransition transition,
+    const std::string& extra_headers) {
   content::Referrer referrer = content::Referrer::SanitizeForRequest(
       url,
       content::Referrer(referring_url.GetAsReferrer(),
                         params_.referrer_policy));
 
   if (params_.link_url == url && disposition != OFF_THE_RECORD)
     params_.custom_context.link_followed = url;
 
-  WebContents* new_contents = source_web_contents_->OpenURL(OpenURLParams(
-      url, referrer, disposition, transition, false));
+  OpenURLParams open_url_params(url, referrer, disposition, transition, false);
+  if (!extra_headers.empty())
+    open_url_params.extra_headers = extra_headers;
+
+  WebContents* new_contents = source_web_contents_->OpenURL(open_url_params);
   if (!new_contents)
     return;
 
   NotifyURLOpened(url, new_contents);
 }
 
 bool RenderViewContextMenuBase::IsCustomItemChecked(int id) const {
   return IsCustomItemCheckedInternal(params_.custom_items, id);
 }
 
 bool RenderViewContextMenuBase::IsCustomItemEnabled(int id) const {
   return IsCustomItemEnabledInternal(params_.custom_items, id);
 }