[ServiceWorker] Update formatting for tests.

LayoutTests/http/tests/serviceworker/resources/indexeddb-worker.js

 var port;
 self.addEventListener('message', function(e) {
     var message = e.data;
     if ('port' in message)
-        doIndexedDBTest(message.port);
-});
+      doIndexedDBTest(message.port);
+  });
 
 function doIndexedDBTest(port) {
-    var delete_request = indexedDB.deleteDatabase('db');
-    delete_request.onsuccess = function() {
-        var open_request = indexedDB.open('db');
-        open_request.onupgradeneeded = function() {
-            var db = open_request.result;
-            db.createObjectStore('store');
-        };
-        open_request.onsuccess = function() {
-            var db = open_request.result;
-            var tx = db.transaction('store', 'readwrite');
-            var store = tx.objectStore('store');
-            store.put('value', 'key');
-            tx.oncomplete = function() {
-                port.postMessage('done');
-            };
-        };
+  var delete_request = indexedDB.deleteDatabase('db');
+  delete_request.onsuccess = function() {
+    var open_request = indexedDB.open('db');
+    open_request.onupgradeneeded = function() {
+      var db = open_request.result;
+      db.createObjectStore('store');
     };
+    open_request.onsuccess = function() {
+      var db = open_request.result;
+      var tx = db.transaction('store', 'readwrite');
+      var store = tx.objectStore('store');
+      store.put('value', 'key');
+      tx.oncomplete = function() {
+        port.postMessage('done');
+      };
+    };
+  };
 }