Add a function to add extra headers from NavigationThrottle

content/browser/loader/navigation_url_loader_impl.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 "content/browser/loader/navigation_url_loader_impl.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "content/browser/frame_host/navigation_request_info.h"
 #include "content/browser/loader/navigation_url_loader_delegate.h"
@@ skipping 23 matching lines @@
                  service_worker_handle_core, base::Passed(&request_info)));
 }
 
 NavigationURLLoaderImpl::~NavigationURLLoaderImpl() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   BrowserThread::DeleteSoon(BrowserThread::IO, FROM_HERE, core_);
   core_ = nullptr;
 }
 
-void NavigationURLLoaderImpl::FollowRedirect() {
+void NavigationURLLoaderImpl::FollowRedirect(
+    const std::vector<std::pair<std::string, std::string> >& extra_headers) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&NavigationURLLoaderImplCore::FollowRedirect,
-                 base::Unretained(core_)));
+                 base::Unretained(core_), extra_headers));
 }
 
 void NavigationURLLoaderImpl::NotifyRequestRedirected(
     const net::RedirectInfo& redirect_info,
     const scoped_refptr<ResourceResponse>& response) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   delegate_->OnRequestRedirected(redirect_info, response);
 }
 
@@ skipping 12 matching lines @@
   delegate_->OnRequestFailed(in_cache, net_error);
 }
 
 void NavigationURLLoaderImpl::NotifyRequestStarted(base::TimeTicks timestamp) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   delegate_->OnRequestStarted(timestamp);
 }
 
 }  // namespace content