Rip out the last dart:io dependency from pkg/http.

pkg/http/test/streamed_request_test.dart

Index: pkg/http/test/streamed_request_test.dart
diff --git a/pkg/http/test/streamed_request_test.dart b/pkg/http/test/streamed_request_test.dart
index c9e3689dc372fc6d9cb1ca76e9812c027627d04e..afe8e098fcc56cbda28b249221fc92868dbc7237 100644
--- a/pkg/http/test/streamed_request_test.dart
+++ b/pkg/http/test/streamed_request_test.dart
@@ -23,52 +23,10 @@ void main() {
       expect(() => request.contentLength = -1, throwsArgumentError);
     });
 
-    test('controls the Content-Length header', () {
-      return startServer().then((_) {
-        var request = new http.StreamedRequest('POST', serverUrl);
-        request.contentLength = 10;
-        request.sink.add([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
-        request.sink.close();
-
-        return request.send();
-      }).then((response) {
-        expect(UTF8.decodeStream(response.stream),
-            completion(parse(containsPair('headers',
-                containsPair('content-length', ['10'])))));
-      }).whenComplete(stopServer);
-    });
-
-    test('defaults to sending no Content-Length', () {
-      return startServer().then((_) {
-        var request = new http.StreamedRequest('POST', serverUrl);
-        request.sink.add([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
-        request.sink.close();
-
-        return request.send();
-      }).then((response) {
-        expect(UTF8.decodeStream(response.stream),
-            completion(parse(containsPair('headers',
-                isNot(contains('content-length'))))));
-      }).whenComplete(stopServer);
-    });
-
     test('is frozen by finalize()', () {
       var request = new http.StreamedRequest('POST', dummyUrl);
       request.finalize();
       expect(() => request.contentLength = 10, throwsStateError);
     });
   });
-
-  // Regression test.
-  test('.send() with a response with no content length', () {
-    return startServer().then((_) {
-      var request = new http.StreamedRequest(
-          'GET', serverUrl.resolve('/no-content-length'));
-      request.sink.close();
-      return request.send();
-    }).then((response) {
-      expect(UTF8.decodeStream(response.stream), completion(equals('body')));
-    }).whenComplete(stopServer);
-  });
-
 }