Add a function to add extra headers from NavigationThrottle

content/browser/frame_host/navigation_request.h

Index: content/browser/frame_host/navigation_request.h
diff --git a/content/browser/frame_host/navigation_request.h b/content/browser/frame_host/navigation_request.h
index 294d086ce677a3f8817dd8ec3b4643e594a10944..de18cfe233896d15c412bb902ecde8f678036c39 100644
--- a/content/browser/frame_host/navigation_request.h
+++ b/content/browser/frame_host/navigation_request.h
@@ -9,6 +9,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/browser/frame_host/navigation_entry_impl.h"
+#include "content/browser/frame_host/navigation_handle_impl.h"
 #include "content/browser/loader/navigation_url_loader_delegate.h"
 #include "content/common/content_export.h"
 #include "content/common/frame_message_enums.h"
@@ -20,7 +21,6 @@ namespace content {
 class FrameNavigationEntry;
 class FrameTreeNode;
 class NavigationControllerImpl;
-class NavigationHandleImpl;
 class NavigationURLLoader;
 class NavigatorDelegate;
 class ResourceRequestBody;
@@ -159,8 +159,12 @@ class CONTENT_EXPORT NavigationRequest : public NavigationURLLoaderDelegate {
 
   // Called when the NavigationThrottles have been checked by the
   // NavigationHandle.
-  void OnStartChecksComplete(NavigationThrottle::ThrottleCheckResult result);
-  void OnRedirectChecksComplete(NavigationThrottle::ThrottleCheckResult result);
+  void OnStartChecksComplete(
+      NavigationThrottle::ThrottleCheckResult result,
+      const NavigationHandleImpl::ExtraHeadersList& extra_headers_list);
+  void OnRedirectChecksComplete(
+      NavigationThrottle::ThrottleCheckResult result,
+      const NavigationHandleImpl::ExtraHeadersList& extra_headers_list);
 
   FrameTreeNode* frame_tree_node_;