Add error handling to socket streams

Add error handling to socket streams

Change the streams onError callbacks to get an Exception argument on
all streams.

Added actual error handling to the socket streams.

As it is difficult to determine where an error should be reported I
decided to call all the registered onError callbacks, that is on the
socket itself and on both input and output stream.

Did some additional cleanup of the naming of OnError argument in some tests.

R=ager@google.com

BUG=
TEST=

Committed: https://code.google.com/p/dart/source/detail?r=5717

[Mads Ager (google), 2012-03-21 13:18:20]

LGTM

https://chromiumcodereview.appspot.com/9812007/diff/1/runtime/bin/socket_stre...
File runtime/bin/socket_stream_impl.dart (right):

https://chromiumcodereview.appspot.com/9812007/diff/1/runtime/bin/socket_stre...
runtime/bin/socket_stream_impl.dart:193: Function _clientCloseHandler;
Where is the _clientCloseHandler used? It doesn't appear to be used in this
code. If it is used in a super class, we should make it a member there? Or maybe
it isn't used?

[Søren Gjesse, 2012-03-21 14:39:46]

https://chromiumcodereview.appspot.com/9812007/diff/1/runtime/bin/socket_stre...
File runtime/bin/socket_stream_impl.dart (right):

https://chromiumcodereview.appspot.com/9812007/diff/1/runtime/bin/socket_stre...
runtime/bin/socket_stream_impl.dart:193: Function _clientCloseHandler;
On 2012/03/21 13:18:20, Mads Ager wrote:
> Where is the _clientCloseHandler used? It doesn't appear to be used in this
> code. If it is used in a super class, we should make it a member there? Or
maybe
> it isn't used?

Thanks for spotting this copy/paste error. Removed.