service worker: Attribute purpose to start worker attempts for UMA

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 8744b98dd897645f9fc7ca170c18daf43f8bdb28..571c0c8e539776002be51923d48c2d43f2fdb1ca 100644
--- a/content/browser/service_worker/service_worker_version_unittest.cc
+++ b/content/browser/service_worker/service_worker_version_unittest.cc
@@ -253,7 +253,8 @@ class ServiceWorkerVersionTest : public testing::Test {
     // Make sure worker is running.
     scoped_refptr<MessageLoopRunner> runner(new MessageLoopRunner);
     version_->RunAfterStartWorker(runner->QuitClosure(),
-                                  CreateReceiverOnCurrentThread(&status));
+                                  CreateReceiverOnCurrentThread(&status),
+                                  event_type);
     runner->Run();
     EXPECT_EQ(SERVICE_WORKER_ERROR_MAX_VALUE, status);
     EXPECT_EQ(ServiceWorkerVersion::RUNNING, version_->running_status());
@@ -783,10 +784,12 @@ TEST_F(ServiceWorkerVersionTest, StaleUpdate_DoNotDeferTimer) {
   // Stale time is not deferred.
   version_->RunAfterStartWorker(
       base::Bind(&base::DoNothing),
-      base::Bind(&ServiceWorkerUtils::NoOpStatusCallback));
+      base::Bind(&ServiceWorkerUtils::NoOpStatusCallback),
+      ServiceWorkerMetrics::EventType::UNKNOWN);
   version_->RunAfterStartWorker(
       base::Bind(&base::DoNothing),
-      base::Bind(&ServiceWorkerUtils::NoOpStatusCallback));
+      base::Bind(&ServiceWorkerUtils::NoOpStatusCallback),
+      ServiceWorkerMetrics::EventType::UNKNOWN);
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(stale_time, version_->stale_time_);