PlzNavigate: support NavigationThrottle::WillProcessResponse

content/browser/loader/navigation_url_loader_impl.h

Index: content/browser/loader/navigation_url_loader_impl.h
diff --git a/content/browser/loader/navigation_url_loader_impl.h b/content/browser/loader/navigation_url_loader_impl.h
index 5c7fcd0d2b01160cd5980a10fbf4cb299d2139fa..acbab76308f99ef9ec7f5e5320ce9c651c9577e0 100644
--- a/content/browser/loader/navigation_url_loader_impl.h
+++ b/content/browser/loader/navigation_url_loader_impl.h
@@ -32,9 +32,9 @@ class NavigationURLLoaderImpl : public NavigationURLLoader {
                           NavigationURLLoaderDelegate* delegate);
   ~NavigationURLLoaderImpl() override;
 
-  // Called in response to OnRequestRedirected to continue processing the
-  // request.
+  // NavigationURLLoader implementation.
   void FollowRedirect() override;
+  void ProceedWithResponse() override;
 
  private:
   friend class NavigationURLLoaderImplCore;