Renamed StreamSink to EventSink. Renamed signalError to addError.

utils/pub/log.dart

Index: utils/pub/log.dart
diff --git a/utils/pub/log.dart b/utils/pub/log.dart
index 5f1c578ad930e2f73b665daadf4e1c9dd3db1321..870a305671abf15d1690deecc0dab04222c82489 100644
--- a/utils/pub/log.dart
+++ b/utils/pub/log.dart
@@ -208,7 +208,7 @@ void _logToStderrWithLabel(Entry entry) {
   _logToStream(stderrSink, entry, showLabel: true);
 }
 
-void _logToStream(StreamSink<List<int>> sink, Entry entry, {bool showLabel}) {
+void _logToStream(EventSink<List<int>> sink, Entry entry, {bool showLabel}) {
   bool firstLine = true;
   for (var line in entry.lines) {
     if (showLabel) {