dart2js: fix try/poi after refactor

pkg/dart2js_incremental/lib/compiler.dart

Index: pkg/dart2js_incremental/lib/compiler.dart
diff --git a/pkg/dart2js_incremental/lib/compiler.dart b/pkg/dart2js_incremental/lib/compiler.dart
index 8704b7c9b6c6f522c730776298b5dcbade2f08b4..f0a195e689361ea7bfbdaf7c1d7bc066d6843e3f 100644
--- a/pkg/dart2js_incremental/lib/compiler.dart
+++ b/pkg/dart2js_incremental/lib/compiler.dart
@@ -153,7 +153,7 @@ compileToStream(
 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;
     });