IndexedDB: Stop using webkit-prefixed versions of APIs in tests

tools/perf/page_sets/endure/indexeddb_app_worker.js

Index: tools/perf/page_sets/endure/indexeddb_app_worker.js
diff --git a/tools/perf/page_sets/endure/indexeddb_app_worker.js b/tools/perf/page_sets/endure/indexeddb_app_worker.js
index b96a898a8293de69be8852f8aac05c287e58d3da..5b17e962de80d918e93c94c4a75618c0e5113b55 100644
--- a/tools/perf/page_sets/endure/indexeddb_app_worker.js
+++ b/tools/perf/page_sets/endure/indexeddb_app_worker.js
@@ -9,18 +9,18 @@
 // temporary store and combined into larger records in a permanent store.
 // When in an "offline" state, nothing else happens.
 
-self.indexedDB = self.indexedDB || self.webkitIndexedDB ||
-  self.mozIndexedDB;
-self.IDBKeyRange = self.IDBKeyRange || self.webkitIDBKeyRange;
-
 function unexpectedErrorCallback(e) {
-  self.postMessage({type: 'ERROR', error: { name: e.target.error.name },
-                    webkitErrorMessage: e.target.webkitErrorMessage});
+  self.postMessage({type: 'ERROR', error: {
+    name: e.target.error.name,
+    message: e.target.error.message
+  }});
 }
 
 function unexpectedAbortCallback(e) {
-  self.postMessage({type: 'ABORT', error: { name: e.target.error.name },
-                    webkitErrorMessage: e.target.webkitErrorMessage});
+  self.postMessage({type: 'ABORT', error: {
+    name: e.target.error.name,
+    message: e.target.error.message
+  }});
 }
 
 function log(message) {
@@ -221,4 +221,4 @@ function combine() {
       combineTimeoutId = setTimeout(combine, COMBINE_TIMEOUT);
     };
   };
-}
+}