Add close to input stream and cleanup socket and streams

runtime/bin/list_stream.dart

Index: runtime/bin/list_stream.dart
diff --git a/runtime/bin/list_stream.dart b/runtime/bin/list_stream.dart
index da5826ec8e956bbec2039d07d62e81b6fb8fc7ad..f925d529ec8eb7d06a1eefc22d83c082dcf4adbd 100644
--- a/runtime/bin/list_stream.dart
+++ b/runtime/bin/list_stream.dart
@@ -26,6 +26,10 @@ class ListInputStream extends _BaseDataInputStream implements InputStream {
     return bytesToRead;
   }
 
+  void _close() {
+    _offset = _buffer.length;
+  }
+
   List<int> _buffer;
   int _offset = 0;
 }
@@ -38,6 +42,9 @@ class DynamicListInputStream
   int available() => _bufferList.length;
 
   void write(List<int> data) {
+    if (_streamMarkedClosed) {
+      throw new StreamException.streamClosed();
+    }
     _bufferList.add(data);
     _checkScheduleCallbacks();
   }
@@ -57,6 +64,11 @@ class DynamicListInputStream
     return bytesToRead;
   }
 
+  void _close() {
+    _streamMarkedClosed = true;
+    _bufferList.clear();
+  }
+
   _BufferList _bufferList;
 }