Upstream service worker indexedDB tests to WPT

third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/resources/indexeddb-worker.js

-var port;
 self.addEventListener('message', function(e) {
     var message = e.data;
-    if ('port' in message)
-      doIndexedDBTest(message.port);
+    if (message.action === 'create') {
+      e.waitUntil(deleteDB()
+          .then(doIndexedDBTest)
+          .then(function() {
+              message.port.postMessage({ type: 'created' });
+            })
+          .catch(function(reason) {
+              message.port.postMessage({ type: 'error', value: reason });
+            }));
+    } else if (message.action === 'cleanup') {
+      e.waitUntil(deleteDB()
+          .then(function() {
+              message.port.postMessage({ type: 'done' });
+            })
+          .catch(function(reason) {
+              message.port.postMessage({ type: 'error', value: reason });
+            }));
+    }
   });
 
+function deleteDB() {
+  return new Promise(function(resolve, reject) {
+      var delete_request = indexedDB.deleteDatabase('db');
+
+      delete_request.onsuccess = resolve;
+      delete_request.onerror = reject;
+    });
+}
+
 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');
+  return new Promise(function(resolve, reject) {
+      var open_request = indexedDB.open('db');
+
+      open_request.onerror = reject;
+      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.onerror = function() {
+            db.close();
+            reject(tx.error);
+          };
+        tx.oncomplete = function() {
+            db.close();
+            resolve();
+          };
+      };
+    });
 }