[PlzNavigate] Add load flags for prefetch navigations

chrome/browser/prerender/prerender_resource_throttle.h

 // 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.
 
 #ifndef CHROME_BROWSER_PRERENDER_PRERENDER_RESOURCE_THROTTLE_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_RESOURCE_THROTTLE_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/prerender/prerender_manager.h"
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/browser/resource_throttle.h"
 #include "content/public/common/resource_type.h"
 
 class GURL;
 
 namespace net {
 class URLRequest;
 }
 
@@ skipping 53 matching lines @@
       bool is_no_store,
       int redirect_count,
       scoped_refptr<PrerenderThrottleInfo> prerender_throttle_info);
 
   // Helper to return the PrerenderContents given a WebContentsGetter. May
   // return nullptr if it's gone.
   static PrerenderContents* PrerenderContentsFromGetter(
       const content::ResourceRequestInfo::WebContentsGetter&
           web_contents_getter);
 
+  void set_prerender_mode(PrerenderMode mode) { prerender_mode_ = mode; }
+
   net::URLRequest* request_;
+  PrerenderMode prerender_mode_;
 
   scoped_refptr<PrerenderThrottleInfo> prerender_throttle_info_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderResourceThrottle);
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_RESOURCE_THROTTLE_H_