PlzNavigate: Get StreamPrivate API to work.

chrome/browser/extensions/api/streams_private/streams_private_api.cc

Index: chrome/browser/extensions/api/streams_private/streams_private_api.cc
diff --git a/chrome/browser/extensions/api/streams_private/streams_private_api.cc b/chrome/browser/extensions/api/streams_private/streams_private_api.cc
index f17bef988217e9e38db5633d59e8b97a46a62c23..e26cb0489ea04453b7a1d74b6a5dfd8527712690 100644
--- a/chrome/browser/extensions/api/streams_private/streams_private_api.cc
+++ b/chrome/browser/extensions/api/streams_private/streams_private_api.cc
@@ -70,6 +70,7 @@ void StreamsPrivateAPI::ExecuteMimeTypeHandler(
     const std::string& view_id,
     int64_t expected_content_size,
     bool embedded,
+    int frame_tree_node_id,
     int render_process_id,
     int render_frame_id) {
   const Extension* extension = ExtensionRegistry::Get(browser_context_)
@@ -89,8 +90,8 @@ void StreamsPrivateAPI::ExecuteMimeTypeHandler(
     std::unique_ptr<StreamContainer> stream_container(new StreamContainer(
         std::move(stream), tab_id, embedded, handler_url, extension_id));
     MimeHandlerStreamManager::Get(browser_context_)
-        ->AddStream(view_id, std::move(stream_container), render_process_id,
-                    render_frame_id);
+        ->AddStream(view_id, std::move(stream_container), web_contents,
+                    frame_tree_node_id, render_process_id, render_frame_id);
     return;
   }
   // Create the event's arguments value.