Rename Date to DateTime.

tools/dom/templates/html/dart2js/indexed_db_dart2js.darttemplate

Index: tools/dom/templates/html/dart2js/indexed_db_dart2js.darttemplate
diff --git a/tools/dom/templates/html/dart2js/indexed_db_dart2js.darttemplate b/tools/dom/templates/html/dart2js/indexed_db_dart2js.darttemplate
index 53145eaca51b17224e837a35c1a4c914fb3e0e03..a42177cc5280046d123758a68d89357fabc994ab 100644
--- a/tools/dom/templates/html/dart2js/indexed_db_dart2js.darttemplate
+++ b/tools/dom/templates/html/dart2js/indexed_db_dart2js.darttemplate
@@ -96,7 +96,7 @@ _convertNativeToDart_IDBKey(nativeKey) {
     return false;  // number, string.
   }
   if (containsDate(nativeKey)) {
-    throw new UnimplementedError('Key containing Date');
+    throw new UnimplementedError('Key containing DateTime');
   }
   // TODO: Cache conversion somewhere?
   return nativeKey;
@@ -123,6 +123,6 @@ _convertNativeToDart_IDBAny(object) {
 }
 
 
-const String _idbKey = '=List|=Object|num|String';  // TODO(sra): Add Date.
+const String _idbKey = '=List|=Object|num|String';  // TODO(sra): Add DateTime.
 const _annotation_Creates_IDBKey = const Creates(_idbKey);
 const _annotation_Returns_IDBKey = const Returns(_idbKey);