PlzNavigate: support NavigationThrottle::WillProcessResponse

content/browser/loader/navigation_resource_handler.h

Index: content/browser/loader/navigation_resource_handler.h
diff --git a/content/browser/loader/navigation_resource_handler.h b/content/browser/loader/navigation_resource_handler.h
index e898663611c903f3ccbc1d373fbfa9c38b264872..b5ba53572ca7fea81276482ac4a9e0519fdac708 100644
--- a/content/browser/loader/navigation_resource_handler.h
+++ b/content/browser/loader/navigation_resource_handler.h
@@ -26,6 +26,9 @@ class NavigationResourceHandler : public ResourceHandler {
   // Called to the loader to resume a paused redirect.
   void FollowRedirect();
 
+  // Called to proceed with the response.
+  void ProceedWithResponse();
+
   // ResourceHandler implementation.
   void SetController(ResourceController* controller) override;
   bool OnRequestRedirected(const net::RedirectInfo& redirect_info,