Pass data saver pref value into embedded worker

content/public/browser/content_browser_client.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 333 matching lines @@
   // with the given scope.
   // Invalid (-1) process/frame ids indicate this is for starting a service
   // worker, which is not necessarily associated with a particular frame.
   // This is called on the IO thread.
   virtual bool AllowServiceWorker(const GURL& scope,
                                   const GURL& first_party,
                                   content::ResourceContext* context,
                                   int render_process_id,
                                   int render_frame_id);
 
+  virtual bool IsDataSaverEnabled(BrowserContext* context);
+
   // Allow the embedder to control if the given cookie can be read.
   // This is called on the IO thread.
   virtual bool AllowGetCookie(const GURL& url,
                               const GURL& first_party,
                               const net::CookieList& cookie_list,
                               ResourceContext* context,
                               int render_process_id,
                               int render_frame_id);
 
   // Allow the embedder to control if the given cookie can be set.
@@ skipping 411 matching lines @@
   // Allows an embedder to provide its own ExternalVideoSurfaceContainer
   // implementation.  Return nullptr to disable external surface video.
   virtual ExternalVideoSurfaceContainer*
   OverrideCreateExternalVideoSurfaceContainer(WebContents* web_contents);
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_