PlzNavigate: support the WebRequest API

content/browser/frame_host/navigation_request.cc

Index: content/browser/frame_host/navigation_request.cc
diff --git a/content/browser/frame_host/navigation_request.cc b/content/browser/frame_host/navigation_request.cc
index 04429831faa4c727f0e8322621a229d452090566..cbe1d1ef7760f21135730910af745d7ffcef3124 100644
--- a/content/browser/frame_host/navigation_request.cc
+++ b/content/browser/frame_host/navigation_request.cc
@@ -21,6 +21,7 @@
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_data.h"
+#include "content/public/browser/navigation_ui_data.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/browser/stream_handle.h"
 #include "content/public/common/content_client.h"
@@ -405,9 +406,14 @@ void NavigationRequest::OnStartChecksComplete(
   // Mark the fetch_start (Navigation Timing API).
   request_params_.navigation_timing.fetch_start = base::TimeTicks::Now();
 
+  std::unique_ptr<NavigationUIData> navigation_ui_data;
+  if (navigation_handle_->navigation_ui_data())
+    navigation_ui_data = navigation_handle_->navigation_ui_data()->Clone();
+
   loader_ = NavigationURLLoader::Create(
       frame_tree_node_->navigator()->GetController()->GetBrowserContext(),
-      std::move(info_), service_worker_context, this);
+      std::move(info_), std::move(navigation_ui_data), service_worker_context,
+      this);
 }
 
 void NavigationRequest::OnRedirectChecksComplete(