Add a function to add extra headers from NavigationThrottle

content/browser/loader/navigation_url_loader_impl.cc

Index: content/browser/loader/navigation_url_loader_impl.cc
diff --git a/content/browser/loader/navigation_url_loader_impl.cc b/content/browser/loader/navigation_url_loader_impl.cc
index 2cae9a6237240334d3d026ea6b1d5f5075744b9b..aef346ac3b966774981881ceaea23c8ac33970af 100644
--- a/content/browser/loader/navigation_url_loader_impl.cc
+++ b/content/browser/loader/navigation_url_loader_impl.cc
@@ -41,13 +41,14 @@ NavigationURLLoaderImpl::~NavigationURLLoaderImpl() {
   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(