Update charted to 0.4.8 and roll

packages/utf/lib/src/utf_16_code_unit_decoder.dart

 // Copyright (c) 2012, 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.
 
 library utf.utf_16_code_unit_decoder;
 
 import 'constants.dart';
 import 'list_range.dart';
 
 /**
  * An Iterator<int> of codepoints built on an Iterator of UTF-16 code units.
  * The parameters can override the default Unicode replacement character. Set
  * the replacementCharacter to null to throw an ArgumentError
  * rather than replace the bad value.
  */
 class Utf16CodeUnitDecoder implements Iterator<int> {
   // TODO(kevmoo): should this field be private?
   final ListRangeIterator utf16CodeUnitIterator;
   final int replacementCodepoint;
   int _current = null;
 
-  Utf16CodeUnitDecoder(List<int> utf16CodeUnits, [int offset = 0, int length,
-      int this.replacementCodepoint =
-      UNICODE_REPLACEMENT_CHARACTER_CODEPOINT]) :
-      utf16CodeUnitIterator =
-          (new ListRange(utf16CodeUnits, offset, length)).iterator;
+  Utf16CodeUnitDecoder(List<int> utf16CodeUnits,
+      [int offset = 0,
+      int length,
+      int this.replacementCodepoint = UNICODE_REPLACEMENT_CHARACTER_CODEPOINT])
+      : utf16CodeUnitIterator =
+            (new ListRange(utf16CodeUnits, offset, length)).iterator;
 
   Utf16CodeUnitDecoder.fromListRangeIterator(
       ListRangeIterator this.utf16CodeUnitIterator,
       int this.replacementCodepoint);
 
   Iterator<int> get iterator => this;
 
   int get current => _current;
 
   bool moveNext() {
@@ skipping 17 matching lines @@
       // merge surrogate pair
       int nextValue = utf16CodeUnitIterator.current;
       if (nextValue >= UNICODE_UTF16_SURROGATE_UNIT_1_BASE &&
           nextValue <= UNICODE_UTF16_RESERVED_HI) {
         value = (value - UNICODE_UTF16_SURROGATE_UNIT_0_BASE) << 10;
         value += UNICODE_UTF16_OFFSET +
             (nextValue - UNICODE_UTF16_SURROGATE_UNIT_1_BASE);
         _current = value;
       } else {
         if (nextValue >= UNICODE_UTF16_SURROGATE_UNIT_0_BASE &&
-           nextValue < UNICODE_UTF16_SURROGATE_UNIT_1_BASE) {
+            nextValue < UNICODE_UTF16_SURROGATE_UNIT_1_BASE) {
           utf16CodeUnitIterator.backup();
         }
         if (replacementCodepoint != null) {
           _current = replacementCodepoint;
         } else {
           throw new ArgumentError(
               "Invalid UTF16 at ${utf16CodeUnitIterator.position}");
         }
       }
     } else if (replacementCodepoint != null) {
       _current = replacementCodepoint;
     } else {
       throw new ArgumentError(
           "Invalid UTF16 at ${utf16CodeUnitIterator.position}");
     }
     return true;
   }
 }
-