Add a function to add extra headers from NavigationThrottle

content/browser/loader/navigation_url_loader_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_IMPL_H_
 #define CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_IMPL_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 16 matching lines @@
  public:
   // The caller is responsible for ensuring that |delegate| outlives the loader.
   NavigationURLLoaderImpl(BrowserContext* browser_context,
                           scoped_ptr<NavigationRequestInfo> request_info,
                           ServiceWorkerNavigationHandle* service_worker_handle,
                           NavigationURLLoaderDelegate* delegate);
   ~NavigationURLLoaderImpl() override;
 
   // Called in response to OnRequestRedirected to continue processing the
   // request.
-  void FollowRedirect() override;
+  void FollowRedirect(const std::vector<std::pair<std::string, std::string> >&
+                          extra_headers) override;
 
  private:
   friend class NavigationURLLoaderImplCore;
 
   // Notifies the delegate of a redirect.
   void NotifyRequestRedirected(const net::RedirectInfo& redirect_info,
                                const scoped_refptr<ResourceResponse>& response);
 
   // Notifies the delegate that the response has started.
   void NotifyResponseStarted(const scoped_refptr<ResourceResponse>& response,
@@ skipping 13 matching lines @@
   NavigationURLLoaderImplCore* core_;
 
   base::WeakPtrFactory<NavigationURLLoaderImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationURLLoaderImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_IMPL_H_