Rename Date to DateTime.

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

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // DO NOT EDIT
 // Auto-generated dart:svg library.
 
 library indexed_db;
 
 import 'dart:html';
@@ skipping 78 matching lines @@
   containsDate(object) {
     if (isJavaScriptDate(object)) return true;
     if (object is List) {
       for (int i = 0; i < object.length; i++) {
         if (containsDate(object[i])) return true;
       }
     }
     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;
 }
 
 /**
  * Converts a Dart object into a valid IDBKey.
  *
  * May return the original input.  Does not mutate input.
  *
  * If necessary, [dartKey] may be copied to ensure all lists are converted into
  * JavaScript Arrays and Dart Dates into JavaScript Dates.
  */
 _convertDartToNative_IDBKey(dartKey) {
   // TODO: Implement.
   return dartKey;
 }
 
 
 
 /// May modify original.  If so, action is idempotent.
 _convertNativeToDart_IDBAny(object) {
   return convertNativeToDart_AcceptStructuredClone(object, mustCopy: false);
 }
 
 
-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);