[WIP] make GURL::path() return a StringPiece

content/browser/service_worker/service_worker_version.cc

Index: content/browser/service_worker/service_worker_version.cc
diff --git a/content/browser/service_worker/service_worker_version.cc b/content/browser/service_worker/service_worker_version.cc
index 60d70167be0bf719f8c6fa3c92d39f5129f5671a..8af8bcaeef7bf40213963b0cf8646e9d37d1c568 100644
--- a/content/browser/service_worker/service_worker_version.cc
+++ b/content/browser/service_worker/service_worker_version.cc
@@ -1369,7 +1369,7 @@ void ServiceWorkerVersion::OnRegisterForeignFetchScopes(
   // Renderer should have already verified all these urls are inside the
   // worker's scope, but verify again here on the browser process side.
   GURL origin = scope_.GetOrigin();
-  std::string scope_path = scope_.path();
+  base::StringPiece scope_path = scope_.path();
   for (const GURL& url : sub_scopes) {
     if (!url.is_valid() || url.GetOrigin() != origin ||
         !base::StartsWith(url.path(), scope_path,