Add 'uri' to HttpException, and include in toString.

sdk/lib/io/http.dart

Index: sdk/lib/io/http.dart
diff --git a/sdk/lib/io/http.dart b/sdk/lib/io/http.dart
index 09b7d8c9cf827e97b8e0c6f69a8b6360efaf0602..3b6697e5c6f81deadc6b406134ebeb12e2dd9419 100644
--- a/sdk/lib/io/http.dart
+++ b/sdk/lib/io/http.dart
@@ -1400,9 +1400,19 @@ abstract class DetachedSocket {
 class HttpException implements IOException {
   final String message;
 

[Bill Hesse, 2013/07/05 12:57:45]

Remove the blank line here?

[Anders Johnsen, 2013/08/20 05:46:31]

Done.

-  const HttpException([String this.message = ""]);
-
-  String toString() => "HttpException: $message";
+  final Uri uri;
+
+  const HttpException(String this.message, {Uri this.uri});
+
+  String toString() {
+    var b = new StringBuffer();
+    b.write('HttpException: ');
+    b.write(message);
+    if (uri != null) {
+      b.write(', uri = $uri');
+    }
+    return b.toString();

[Bill Hesse, 2013/07/05 12:57:45]

How about 
(uri == null) ? "HttpException: $message" :
                "HttpException: $message, uri = $uri"

[Anders Johnsen, 2013/08/20 05:46:31]

We use buffers in other exceptions, I think it's fine to follow that style.

+  }
 }