No longer work around issue 7761.

pkg/http/lib/src/utils.dart

Index: pkg/http/lib/src/utils.dart
diff --git a/pkg/http/lib/src/utils.dart b/pkg/http/lib/src/utils.dart
index 28e2bfbec3141a0f8a7e42fef898ff92b49d8738..bca314d95cf1828fe0f51b6b7b612b8d379d469c 100644
--- a/pkg/http/lib/src/utils.dart
+++ b/pkg/http/lib/src/utils.dart
@@ -172,8 +172,7 @@ StreamConsumer<List<int>, dynamic> wrapOutputStream(OutputStream stream) =>
 class _OutputStreamConsumer implements StreamConsumer<List<int>, dynamic> {
   final OutputStream _outputStream;
 
-  _OutputStreamConsumer(this._outputStream)
-    : super();
+  _OutputStreamConsumer(this._outputStream);
 
   Future consume(Stream<List<int>> stream) {
     // TODO(nweiz): we have to manually keep track of whether or not the
@@ -182,19 +181,29 @@ class _OutputStreamConsumer implements StreamConsumer<List<int>, dynamic> {
     // the following TODO.
     var completed = false;
     var completer = new Completer();
-    stream.listen((data) => _outputStream.write(data), onDone: () {
-      _outputStream.close();
-      // TODO(nweiz): wait until _outputStream.onClosed is called once issue
-      // 7761 is fixed.
-      if (!completed) completer.complete();
-      completed = true;
-    });
+    stream.listen((data) {
+      // Writing empty data to a closed stream can cause errors.
+      if (data.isEmpty) return;
+
+      // TODO(nweiz): remove this try/catch when issue 7836 is fixed.
+      try {
+        _outputStream.write(data);
+      } catch (e, stack) {
+        if (!completed) completer.completeError(e, stack);
+        completed = true;
+      }
+    }, onDone: () => _outputStream.close());
 
     _outputStream.onError = (e) {
       if (!completed) completer.completeError(e);
       completed = true;
     };
 
+    _outputStream.onClosed = () {
+      if (!completed) completer.complete();
+      completed = true;
+    };
+
     return completer.future;
   }
 }