Update the streams interfaces

runtime/bin/input_stream.dart

Index: runtime/bin/input_stream.dart
diff --git a/runtime/bin/input_stream.dart b/runtime/bin/input_stream.dart
index 48320138d136e70f4d746a33113404c3bbb1ee70..1ea961bf918182d84231ba5c53284bcce034a87c 100644
--- a/runtime/bin/input_stream.dart
+++ b/runtime/bin/input_stream.dart
@@ -22,3 +22,66 @@ interface InputStream {
    */
   void readUntil(List<int> pattern, void callback(List<int> buffer));
 }
+
+
+interface InputStream2 {
+  /**
+   * Reads as much data as is available from the stream. If no data is
+   * available null will be returned.
+   */
+  List<int> read();
+
+  /**
+   * The data handler gets called when data is available.
+   */
+  void set dataHandler(void callback());
+
+  /**
+   * The close handler gets called when the underlying communication
+   * channel is closed and no more data will become available. Not all
+   * types of communication channels will emit close events.
+   */
+  void set closeHandler(void callback());
+
+  /**
+   * The error handler gets called when the underlying communication
+   * channel gets into some kind of error situation.
+   */
+  void set errorHandler(void callback(int error));
+}
+
+
+interface StringInputStream factory _StringInputStream {
+  /**
+   * Decodes a binary input stream into characters using the specified
+   * encoding.
+   */
+  StringInputStream(InputStream2 input, [String encoding]);
+
+  /**
+   * Reads as many characters as is available from the stream. If no data is
+   * available null will be returned.
+   */
+  String read();
+
+  /**
+   * Returns the encoding used to decode the binary data into characters.
+   */
+  String get encoding();
+
+  /**
+   * The data handler gets called when data is available.
+   */
+  void set dataHandler(void callback());
+}
+
+
+class StreamException implements Exception {
+  const StreamException([String this.message = ""]);
+  String toString() => "StreamException: $message";
+
+  /*
+   * Contains the exception message.
+   */
+  final String message;
+}