Use tri-state enum for the existence of Fetch Handler in ServiceWorkerVersion.

content/browser/service_worker/service_worker_version_unittest.cc

Index: content/browser/service_worker/service_worker_version_unittest.cc
diff --git a/content/browser/service_worker/service_worker_version_unittest.cc b/content/browser/service_worker/service_worker_version_unittest.cc
index fb886d5db60ceb6384a9aebe7b94dec2365e9a97..ce376603d3a503b4c1989924272363a94d2fdcd5 100644
--- a/content/browser/service_worker/service_worker_version_unittest.cc
+++ b/content/browser/service_worker/service_worker_version_unittest.cc
@@ -223,6 +223,8 @@ class ServiceWorkerVersionTest : public testing::Test {
     records.push_back(
         ServiceWorkerDatabase::ResourceRecord(10, version_->script_url(), 100));
     version_->script_cache_map()->SetResources(records);
+    version_->set_fetch_handler_existence(
+        ServiceWorkerVersion::FetchHandlerExistence::EXISTS);
 
     // Make the registration findable via storage functions.
     ServiceWorkerStatusCode status = SERVICE_WORKER_ERROR_FAILED;