Remove JavaSystem from java_core.

pkg/analyzer/lib/src/generated/source.dart

 // Copyright (c) 2014, 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.
 
 library analyzer.src.generated.source;
 
 import 'dart:collection';
 import "dart:math" as math;
 
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 24 matching lines @@
    */
   HashMap<String, String> _contentMap = new HashMap<String, String>();
 
   /**
    * A table mapping the full path of sources to the modification stamps of
    * those sources. This is used when the default contents of a source has been
    * overridden.
    */
   HashMap<String, int> _stampMap = new HashMap<String, int>();
 
+  int _nextStamp = 0;
+
   /**
    * Visit all entries of this cache.
    */
   void accept(ContentCacheVisitor visitor) {
     _contentMap.forEach((String fullPath, String contents) {
       int stamp = _stampMap[fullPath];
       visitor(fullPath, stamp, contents);
     });
   }
 
@@ skipping 20 matching lines @@
    * the effect of overriding the default contents of the source. If the
    * contents are `null` the override is removed so that the default contents
    * will be returned.
    */
   String setContents(Source source, String contents) {
     String fullName = source.fullName;
     if (contents == null) {
       _stampMap.remove(fullName);
       return _contentMap.remove(fullName);
     } else {
-      int newStamp = JavaSystem.currentTimeMillis();
+      int newStamp = _nextStamp++;
       int oldStamp = _stampMap[fullName];
       _stampMap[fullName] = newStamp;
       // Occasionally, if this method is called in rapid succession, the
       // timestamps are equal. Guard against this by artificially incrementing
       // the new timestamp.
       if (newStamp == oldStamp) {
         _stampMap[fullName] = newStamp + 1;
       }
       String oldContent = _contentMap[fullName];
       _contentMap[fullName] = contents;
@@ skipping 834 matching lines @@
   Source resolveAbsolute(Uri uri, [Uri actualUri]);
 
   /**
    * Return an absolute URI that represents the given [source], or `null` if a
    * valid URI cannot be computed.
    *
    * The computation should be based solely on [source.fullName].
    */
   Uri restoreAbsolute(Source source) => null;
 }