Fix datagram issue where available is not correctly updated upon receive.

runtime/bin/socket_patch.dart

Index: runtime/bin/socket_patch.dart
diff --git a/runtime/bin/socket_patch.dart b/runtime/bin/socket_patch.dart
index 23e3f9e200269a9b5423cf64a983c5330fc1af31..6bfb3e4e50794663f88cfa185397520b3cb93555 100644
--- a/runtime/bin/socket_patch.dart
+++ b/runtime/bin/socket_patch.dart
@@ -568,13 +568,7 @@ class _NativeSocket extends _NativeSocketNativeWrapper with _ServiceObject {
       return null;
     }
     if (result != null) {

[Søren Gjesse, 2014/09/15 08:20:32]

Please add a comment that available is only the size of the next datagram, but
that is enough to trigger another READ event.

[Anders Johnsen, 2014/09/15 08:21:37]

Done.

-      if (Platform.isMacOS) {
-        // Mac includes the header size, so we need to query the actual
-        // available.
-        available = nativeAvailable();
-      } else {
-        available -= result.data.length;
-      }
+      available = nativeAvailable();
       totalRead += result.data.length;
     }
     readCount++;