Remove dart backend

test/dart_codegen/expect/convert/line_splitter.dart

-part of dart.convert;
- class LineSplitter extends Converter<String, List<String>> {const LineSplitter();
- List<String> convert(String data) {
-  var lines = new List<String>();
-   _LineSplitterSink._addSlice(data, 0, data.length, true, lines.add);
-   return lines;
-  }
- StringConversionSink startChunkedConversion(Sink<dynamic> sink) {
-  if (sink is! StringConversionSink) {
-    sink = new StringConversionSink.from(DEVC$RT.cast(sink, DEVC$RT.type((Sink<dynamic> _) {
-      }
-    ), DEVC$RT.type((Sink<String> _) {
-      }
-    ), "CompositeCast", """line 24, column 44 of dart:convert/line_splitter.dart: """, sink is Sink<String>, false));
-    }
-   return new _LineSplitterSink(DEVC$RT.cast(sink, DEVC$RT.type((Sink<dynamic> _) {
-    }
-  ), StringConversionSink, "ImplicitCast", """line 26, column 34 of dart:convert/line_splitter.dart: """, sink is StringConversionSink, true));
-  }
-}
- class _LineSplitterSink extends StringConversionSinkBase {static const int _LF = 10;
- static const int _CR = 13;
- final StringConversionSink _sink;
- String _carry;
- _LineSplitterSink(this._sink);
- void addSlice(String chunk, int start, int end, bool isLast) {
-if (_carry != null) {
-  chunk = _carry + chunk.substring(start, end);
-   start = 0;
-   end = chunk.length;
-   _carry = null;
-  }
- _carry = _addSlice(chunk, start, end, isLast, _sink.add);
- if (isLast) _sink.close();
-}
- void close() {
-addSlice('', 0, 0, true);
-}
- static String _addSlice(String chunk, int start, int end, bool isLast, void adder(String val)) {
-int pos = start;
- while (pos < end) {
-  int skip = 0;
-   int char = chunk.codeUnitAt(pos);
-   if (char == _LF) {
-    skip = 1;
-    }
-   else if (char == _CR) {
-    skip = 1;
-     if (pos + 1 < end) {
-      if (chunk.codeUnitAt(pos + 1) == _LF) {
-        skip = 2;
-        }
-      }
-     else if (!isLast) {
-      return chunk.substring(start, end);
-      }
-    }
-   if (skip > 0) {
-    adder(chunk.substring(start, pos));
-     start = pos = pos + skip;
-    }
-   else {
-    pos++;
-    }
-  }
- if (pos != start) {
-  var carry = chunk.substring(start, pos);
-   if (isLast) {
-    adder(carry);
-    }
-   else {
-    return carry;
-    }
-  }
- return null;
-}
-}