dart2js: fix try/poi after refactor

pkg/dart2js_incremental/lib/compiler.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.
 
 import 'dart:io';
 
 import 'dart:async' show
     EventSink,
     Future,
     Stream,
@@ skipping 135 matching lines @@
         break;
       }
     }
   }
 }
 
 /// Output provider which collects output in [output].
 class OutputProvider implements CompilerOutput {
   final Map<String, String> output = new Map<String, String>();
 
-  EventSink<String> createSink(String name, String extension) {
+  EventSink<String> createEventSink(String name, String extension) {
     return new StringEventSink((String data) {
       output['$name.$extension'] = data;
     });
   }
 
   String operator[](String key) => output[key];
 }
 
 /// Helper class to collect sources.
 class StringEventSink implements EventSink<String> {
@@ skipping 35 matching lines @@
 
   final Stopwatch stopwatch;
 
   final String updates;
 
   CompilerEvent(
       this.kind, this.compiler, this._output, this.stopwatch, {this.updates});
 
   String operator[](String key) => _output[key];
 }