Fix various nits in VM patch files.

sdk/lib/convert/string_conversion.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.convert;
 
 /**
  * This class provides an interface for converters to
  * efficiently transmit String data.
  *
@@ skipping 175 matching lines @@
   ClosableStringSink asStringSink() {
     return new _StringConversionSinkAsStringSinkAdapter(this);
   }
 }
 
 /**
  * This class is a [StringConversionSink] that wraps a [StringSink].
  */
 class _StringSinkConversionSink extends StringConversionSinkBase {
   StringSink _stringSink;
-  _StringSinkConversionSink(StringSink this._stringSink);
+  _StringSinkConversionSink(this._stringSink);
 
   void close() {}
   void addSlice(String str, int start, int end, bool isLast) {
     if (start != 0 || end != str.length) {
       for (int i = start; i < end; i++) {
         _stringSink.writeCharCode(str.codeUnitAt(i));
       }
     } else {
       _stringSink.write(str);
     }
@@ skipping 126 matching lines @@
     _decoder.convert(chunk, startIndex, endIndex);
     if (_buffer.isNotEmpty) {
       String accumulated = _buffer.toString();
       _chunkedSink.addSlice(accumulated, 0, accumulated.length, isLast);
       _buffer.clear();
       return;
     }
     if (isLast) close();
   }
 }