Cast HttpRequest and HttpClientResponse streams to List<int> (#384)

In preparation for a change to HttpRequest and HttpClientResponse
whereby they'll implement `Stream<Uint8List>` rather than
`Stream<List<int>>`, this change casts those streams to
`Stream<List<int>>` before any calls to `transform()` those
streams.

This is a forwards-compatible change that should be a no-op for
existing usages.

dart-lang/sdk#36900
#383

LibTest/io/HttpClient/addCredentials_A01_t01.dart

@@ -43,7 +43,7 @@ test() async {
     .then((HttpClientRequest request) {
       return request.close();
     }).then((HttpClientResponse response) {
-      response.transform(utf8.decoder).listen((content) {
+      response.cast<List<int>>().transform(utf8.decoder).listen((content) {
         Expect.equals(helloWorld, content);
       });
     });

LibTest/io/HttpClient/authenticateProxy_A01_t01.dart

@@ -75,7 +75,7 @@ test() async {
           "http://${InternetAddress.loopbackIPv4.address}:${server.port}"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {});
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {});
   });
 }
 

LibTest/io/HttpClient/authenticateProxy_A01_t02.dart

@@ -79,7 +79,7 @@ test() async {
           "http://${InternetAddress.loopbackIPv4.address}:${server.port}"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {});
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {});
   });
 }
 

LibTest/io/HttpClient/authenticateProxy_A02_t01.dart

@@ -73,7 +73,7 @@ test() async {
           "http://${InternetAddress.loopbackIPv4.address}:${server.port}"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {});
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {});
   });
 }
 

LibTest/io/HttpClient/authenticate_A01_t01.dart

@@ -76,7 +76,7 @@ test() async {
           "http://${InternetAddress.loopbackIPv4.address}:${server.port}/xxx"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {});
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {});
   });
 }
 

LibTest/io/HttpClient/authenticate_A01_t02.dart

@@ -69,7 +69,7 @@ test() async {
           "http://${InternetAddress.loopbackIPv4.address}:${server.port}/xxx"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {});
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {});
   });
 }
 

LibTest/io/HttpClient/authenticate_A02_t01.dart

@@ -64,7 +64,7 @@ test() async {
           "http://${InternetAddress.loopbackIPv4.address}:${server.port}/xxx"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {});
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {});
   });
 }
 

LibTest/io/HttpClient/autoUncompress_A02_t01.dart

@@ -58,7 +58,7 @@ test() async {
       .then((HttpClientRequest request) {
     return request.close();
   }).then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(helloWorld, content);
       asyncEnd();
     });

LibTest/io/HttpClient/autoUncompress_A02_t02.dart

@@ -58,7 +58,7 @@ test() async {
       .then((HttpClientRequest request) {
     return request.close();
   }).then((HttpClientResponse response) {
-    response.transform(gzip.decoder).transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(gzip.decoder).transform(utf8.decoder).listen((content) {
       Expect.equals(helloWorld, content);
       asyncEnd();
     });

LibTest/io/HttpClient/autoUncompress_A03_t01.dart

@@ -62,7 +62,7 @@ test() async {
     Expect.listEquals([helloWorld.length.toString()],
         response.headers[HttpHeaders.contentLengthHeader]);
     Expect.listEquals(["utf-8"], response.headers[HttpHeaders.contentEncodingHeader]);
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(helloWorld, content);
       asyncEnd();
     });

LibTest/io/HttpClient/autoUncompress_A04_t01.dart

@@ -58,7 +58,7 @@ test() async {
       .then((HttpClientRequest request) {
     return request.close();
   }).then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(helloWorld, content);
       Expect.equals("gzip", response.headers.value(HttpHeaders.contentEncodingHeader));
       asyncEnd();

LibTest/io/HttpClient/autoUncompress_A04_t02.dart

@@ -62,7 +62,7 @@ test() async {
   }).then((HttpClientResponse response) {
     // Server sends uncompressed data. autoUncompress sets to true but
     // uncompression should not be performed
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(helloWorld, content);
       asyncEnd();
     });

LibTest/io/HttpClient/autoUncompress_A04_t03.dart

@@ -63,7 +63,7 @@ test() async {
     // Server sends uncompressed data but on client autoUncompress sets to true
     // and Content-Encoding header value is gzip so we are trying to uncompress
     // not compressed data
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
     }, onError: (_) {
       asyncEnd();
     });

LibTest/io/HttpClient/close_A01_t01.dart

@@ -41,7 +41,7 @@ test() async {
   client.getUrl(Uri.parse("http://${localhost}:${server.port}"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(helloWorld, content);
       client.close(force: true);
 

LibTest/io/HttpClient/deleteUrl_A01_t01.dart

@@ -38,7 +38,7 @@ test() async {
   client.deleteUrl(Uri.parse("http://${localhost}:${server.port}/xxx"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-        response.transform(utf8.decoder).listen((content) {
+        response.cast<List<int>>().transform(utf8.decoder).listen((content) {
           Expect.equals(helloWorld, content);
     });
   });

LibTest/io/HttpClient/deleteUrl_A01_t02.dart

@@ -39,7 +39,7 @@ test() async {
           .parse("http://${localhost}:${server.port}/y/xxx?q=12&i=j#fragment"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(helloWorld, content);
     });
   });

LibTest/io/HttpClient/delete_A01_t01.dart

@@ -41,7 +41,7 @@ test() async {
   client.delete(localhost, server.port, "/xxx")
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-        response.transform(utf8.decoder).listen((content) {
+        response.cast<List<int>>().transform(utf8.decoder).listen((content) {
           Expect.equals(helloWorld, content);
     });
   });

LibTest/io/HttpClient/delete_A01_t02.dart

@@ -41,7 +41,7 @@ test() async {
   client.delete(localhost, server.port, "y/Xxx?q=12&i=j#fragment")
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-        response.transform(utf8.decoder).listen((content) {
+        response.cast<List<int>>().transform(utf8.decoder).listen((content) {
           Expect.equals(helloWorld, content);
     });
   });

LibTest/io/HttpClient/findProxyFromEnvironment_A01_t01.dart

@@ -75,7 +75,7 @@ test() async {
   client.get(localhost, server.port, "")
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(hello, content);
     });
   });

LibTest/io/HttpClient/findProxyFromEnvironment_A02_t01.dart

@@ -80,7 +80,7 @@ test() async {
   client.get(localhost, server.port, "")
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(hello, content);
     });
   });

LibTest/io/HttpClient/findProxyFromEnvironment_A02_t02.dart

@@ -86,7 +86,7 @@ test() async {
   client.get(localhost, server.port, "")
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(hello, content);
     });
   });

LibTest/io/HttpClient/findProxyFromEnvironment_A02_t03.dart

@@ -86,7 +86,7 @@ test() async {
   client.get(localhost, server.port, "")
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(hello, content);
     });
   });

LibTest/io/HttpClient/findProxyFromEnvironment_A02_t04.dart

@@ -87,7 +87,7 @@ test() async {
   client.get(localhost, server.port, "")
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(hello, content);
     });
   });

LibTest/io/HttpClient/findProxyFromEnvironment_A02_t05.dart

@@ -87,7 +87,7 @@ test() async {
   client.get(localhost, server.port, "")
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(hello, content);
     });
   });

LibTest/io/HttpClient/findProxyFromEnvironment_A03_t01.dart

@@ -80,7 +80,7 @@ test() async {
   client.get(localhost, server.port, "")
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(hello, content);
     });
   });

LibTest/io/HttpClient/findProxyFromEnvironment_A04_t01.dart

@@ -90,7 +90,7 @@ test() async {
   client.get(localhost, server.port, "")
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(hello, content);
     });
   });

LibTest/io/HttpClient/findProxy_A01_t01.dart

@@ -79,7 +79,7 @@ test() async {
           "http://${InternetAddress.loopbackIPv4.address}:${server.port}"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {});
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {});
   });
 }
 

LibTest/io/HttpClient/findProxy_A01_t02.dart

@@ -79,7 +79,7 @@ test() async {
           "http://${InternetAddress.loopbackIPv4.address}:${server.port}"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {});
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {});
   });
 }
 

LibTest/io/HttpClient/findProxy_A02_t01.dart

@@ -69,7 +69,7 @@ test() async {
           "http://${InternetAddress.loopbackIPv4.address}:${server.port}"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {});
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {});
   });
 }
 

LibTest/io/HttpClient/findProxy_A02_t02.dart

@@ -69,7 +69,7 @@ test() async {
           "http://${InternetAddress.loopbackIPv4.address}:${server.port}"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {});
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {});
   });
 }
 

LibTest/io/HttpClient/findProxy_A03_t01.dart

@@ -88,7 +88,7 @@ test() async {
           "http://${InternetAddress.loopbackIPv4.address}:${server.port}"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {});
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {});
   });
 }
 

LibTest/io/HttpClient/findProxy_A03_t02.dart

@@ -91,7 +91,7 @@ test() async {
       "http://${InternetAddress.loopbackIPv4.address}:${server.port}"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {});
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {});
   });
 }
 

LibTest/io/HttpClient/getUrl_A01_t01.dart

@@ -40,7 +40,7 @@ test() async {
         Expect.equals("GET", request.method);
         return request.close();
       }).then((HttpClientResponse response) {
-        response.transform(utf8.decoder).listen((content) {
+        response.cast<List<int>>().transform(utf8.decoder).listen((content) {
           Expect.equals(helloWorld, content);
     });
   });

LibTest/io/HttpClient/getUrl_A01_t02.dart

@@ -39,7 +39,7 @@ test() async {
           .parse("http://${localhost}:${server.port}/y/xxx?q=12&i=j#fragment"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(helloWorld, content);
     });
   });

LibTest/io/HttpClient/get_A01_t01.dart

@@ -43,7 +43,7 @@ test() async {
         Expect.equals("GET", request.method);
         return request.close();
       }).then((HttpClientResponse response) {
-        response.transform(utf8.decoder).listen((content) {
+        response.cast<List<int>>().transform(utf8.decoder).listen((content) {
           Expect.equals(helloWorld, content);
     });
   });

LibTest/io/HttpClient/get_A01_t02.dart

@@ -41,7 +41,7 @@ test() async {
   client.get(localhost, server.port, "y/Xxx?q=12&i=j#fragment")
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-        response.transform(utf8.decoder).listen((content) {
+        response.cast<List<int>>().transform(utf8.decoder).listen((content) {
           Expect.equals(helloWorld, content);
     });
   });

LibTest/io/HttpClient/headUrl_A01_t01.dart

@@ -40,7 +40,7 @@ test() async {
       Expect.equals("HEAD", request.method);
       return request.close();
     }).then((HttpClientResponse response) {
-      response.transform(utf8.decoder).listen((content) {
+      response.cast<List<int>>().transform(utf8.decoder).listen((content) {
         Expect.equals(helloWorld, content);
     });
   });

LibTest/io/HttpClient/headUrl_A01_t02.dart

@@ -39,7 +39,7 @@ test() async {
           .parse("http://${localhost}:${server.port}/y/xxx?q=12&i=j#fragment"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(helloWorld, content);
     });
   });

LibTest/io/HttpClient/head_A01_t01.dart

@@ -43,7 +43,7 @@ test() async {
       Expect.equals("HEAD", request.method);
       return request.close();
     }).then((HttpClientResponse response) {
-      response.transform(utf8.decoder).listen((content) {
+      response.cast<List<int>>().transform(utf8.decoder).listen((content) {
         Expect.equals(helloWorld, content);
     });
   });

LibTest/io/HttpClient/head_A01_t02.dart

@@ -41,7 +41,7 @@ test() async {
   client.head(localhost, server.port, "y/Xxx?q=12&i=j#fragment")
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-        response.transform(utf8.decoder).listen((content) {
+        response.cast<List<int>>().transform(utf8.decoder).listen((content) {
           Expect.equals(helloWorld, content);
     });
   });

LibTest/io/HttpClient/idleTimeout_A02_t01.dart

@@ -41,7 +41,7 @@ test() async {
     request.headers.set(HttpHeaders.connectionHeader, "keep-alive");
     return request.close();
   }).then((HttpClientResponse response) {
-    response.transform(utf8.decoder).listen((content) {
+    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
       Expect.equals(helloWorld + helloWorld, content);
     });
   });

LibTest/io/HttpClient/openUrl_A01_t01.dart

@@ -48,7 +48,7 @@ test() async {
       Expect.equals("GET", request.method);
       return request.close();
     }).then((HttpClientResponse response) {
-      response.transform(utf8.decoder).listen((content) {
+      response.cast<List<int>>().transform(utf8.decoder).listen((content) {
         Expect.equals(helloWorld, content);
     });
   });

LibTest/io/HttpClient/openUrl_A01_t02.dart

@@ -47,7 +47,7 @@ test() async {
       Uri.parse("http://${localhost}:${server.port}/y/xxx?q=12&i=j#fragment"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-        response.transform(utf8.decoder).listen((content) {
+        response.cast<List<int>>().transform(utf8.decoder).listen((content) {
           Expect.equals(helloWorld, content);
     });
   });

LibTest/io/HttpClient/openUrl_A01_t03.dart

@@ -47,7 +47,7 @@ test() async {
       Uri.parse("http://${localhost}:${server.port}/Xxx?q=12&i=j#fragment"))
       .then((HttpClientRequest request) => request.close())
       .then((HttpClientResponse response) {
-        response.transform(utf8.decoder).listen((content) {
+        response.cast<List<int>>().transform(utf8.decoder).listen((content) {
           Expect.equals(helloWorld, content);
     });
   });