[ServiceWorker] Set setSkipServiceWorker flag of the request from NPAPI plugins

content/child/npapi/plugin_url_fetcher.cc

Index: content/child/npapi/plugin_url_fetcher.cc
diff --git a/content/child/npapi/plugin_url_fetcher.cc b/content/child/npapi/plugin_url_fetcher.cc
index 42617ab894123459a082a7de4b90f18c39b883d5..b0ed299b0f7efcccadb6d38dade7f0cc2edaad9d 100644
--- a/content/child/npapi/plugin_url_fetcher.cc
+++ b/content/child/npapi/plugin_url_fetcher.cc
@@ -114,6 +114,8 @@ PluginURLFetcher::PluginURLFetcher(PluginStreamUrl* plugin_stream,
   request_info.requestor_pid = origin_pid;
   request_info.request_type = RESOURCE_TYPE_OBJECT;
   request_info.routing_id = render_view_id;
+  // ServiceWorker is disabled for NPAPI.
+  request_info.skip_service_worker = true;
 
   RequestExtraData extra_data;
   extra_data.set_render_frame_id(render_frame_id);