Add a function to add extra headers from NavigationThrottle

content/browser/loader/navigation_url_loader_unittest.cc

Index: content/browser/loader/navigation_url_loader_unittest.cc
diff --git a/content/browser/loader/navigation_url_loader_unittest.cc b/content/browser/loader/navigation_url_loader_unittest.cc
index 418046ef46002ccd4b430d474166a9f84563cf3a..bbfdf131fc45af03aeb3a5d79286390508f01b42 100644
--- a/content/browser/loader/navigation_url_loader_unittest.cc
+++ b/content/browser/loader/navigation_url_loader_unittest.cc
@@ -37,6 +37,8 @@
 
 namespace content {
 
+using ExtraHeadersList = std::vector<std::pair<std::string, std::string> >;
+
 namespace {
 
 class StreamProtocolHandler
@@ -265,7 +267,7 @@ TEST_F(NavigationURLLoaderTest, RequestRedirected) {
   EXPECT_EQ(1, delegate.on_request_handled_counter());
 
   // Wait for the response to complete.
-  loader->FollowRedirect();
+  loader->FollowRedirect(ExtraHeadersList());
   delegate.WaitForResponseStarted();
 
   // Check the response is correct.
@@ -312,7 +314,7 @@ TEST_F(NavigationURLLoaderTest, CancelResponseRace) {
 
   // In the same event loop iteration, follow the redirect (allowing the
   // response to go through) and destroy the loader.
-  loader->FollowRedirect();
+  loader->FollowRedirect(ExtraHeadersList());
   loader.reset();
 
   // Verify the URLRequestTestJob no longer has anything paused and that no