Fixing Indexed DB from latest Blink roll

sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart

Index: sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart
diff --git a/sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart b/sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart
index 3fbe9ff4d2bf8b12039b5c5c507d83586e9e557a..345553fab9d506602296b82e1885aac6e231568d 100644
--- a/sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart
+++ b/sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart
@@ -578,7 +578,12 @@ class Index extends Interceptor native "IDBIndex" {
     } else {
       key_OR_range = range;
     }
-    var request = _openCursor(key_OR_range, direction);
+    var request;
+    if (direction == null) {
+      request = _openCursor(key_OR_range);
+    } else {
+      request = _openCursor(key_OR_range, direction);
+    }
     return ObjectStore._cursorStreamFromResult(request, autoAdvance);
   }
 
@@ -600,7 +605,12 @@ class Index extends Interceptor native "IDBIndex" {
     } else {
       key_OR_range = range;
     }
-    var request = _openKeyCursor(key_OR_range, direction);
+    var request;
+    if (direction == null) {
+      request = _openKeyCursor(key_OR_range);
+    } else {
+      request = _openKeyCursor(key_OR_range, direction);
+    }
     return ObjectStore._cursorStreamFromResult(request, autoAdvance);
   }
 
@@ -654,7 +664,7 @@ class Index extends Interceptor native "IDBIndex" {
   @Returns('Request')
   @Creates('Request')
   @Creates('Cursor')
-  Request _openCursor(Object key, String direction) native;
+  Request _openCursor(Object key, [String direction]) native;
 
   @JSName('openKeyCursor')
   @DomName('IDBIndex.openKeyCursor')
@@ -662,7 +672,7 @@ class Index extends Interceptor native "IDBIndex" {
   @Returns('Request')
   @Creates('Request')
   @Creates('Cursor')
-  Request _openKeyCursor(Object key, String direction) native;
+  Request _openKeyCursor(Object key, [String direction]) native;
 
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file