[corelib] dart:developer timeline flow events

pkg/dev_compiler/tool/input_sdk/patch/developer_patch.dart

 // Copyright (c) 2015, 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.
 
 // Patch file for dart:developer library.
 
 import 'dart:_js_helper' show patch, ForceInline;
 import 'dart:_foreign_helper' show JS;
 
 @patch
@@ skipping 57 matching lines @@
   return -1;
 }
 
 @patch
 void _reportCompleteEvent(int start, int startCpu, String category, String name,
     String argumentsAsJson) {
   // TODO.
 }
 
 @patch
+void _reportFlowEvent(int start, int startCpu, String category, String name,
+    int type, int id, String argumentsAsJson) {
+  // TODO.
+}
+
+@patch
 void _reportInstantEvent(
     int start, String category, String name, String argumentsAsJson) {
   // TODO.
 }
 
 @patch
 int _getNextAsyncId() {
   return 0;
 }
 
@@ skipping 72 matching lines @@
     return old;
   }
 
   static final UserTag _defaultTag = new _FakeUserTag('Default');
 }
 
 var _currentTag = _FakeUserTag._defaultTag;
 
 @patch
 UserTag getCurrentTag() => _currentTag;