Move Iterable implementation to collection.

sdk/lib/_internal/compiler/implementation/scanner/token.dart

 // Copyright (c) 2011, 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 scanner;
 
 const int EOF_TOKEN = 0;
 
 const int KEYWORD_TOKEN = $k;
 const int IDENTIFIER_TOKEN = $a;
@@ skipping 167 matching lines @@
     : this.fromSource(info, new SourceString(value), charOffset);
 
   StringToken.fromSource(PrecedenceInfo info, this.value, int charOffset)
     : super(info, charOffset);
 
   String toString() => "StringToken(${value.slowToString()})";
 
   String slowToString() => value.slowToString();
 }
 
-abstract class SourceString extends Iterable<int> {
+abstract class SourceString extends IterableBase<int> {
   const factory SourceString(String string) = StringWrapper;
 
   void printOn(StringBuffer sb);
 
   /** Gives a [SourceString] that is not including the [initial] first and
    * [terminal] last characters. This is only intended to be used to remove
    * quotes from string literals (including an initial '@' for raw strings).
    */
   SourceString copyWithoutQuotes(int initial, int terminal);
 
   String get stringValue;
 
   String slowToString();
 
   bool get isEmpty;
 
   bool isPrivate();
 }
 
-class StringWrapper extends Iterable<int> implements SourceString {
+class StringWrapper extends IterableBase<int> implements SourceString {
   final String stringValue;
 
   const StringWrapper(String this.stringValue);
 
   int get hashCode => stringValue.hashCode;
 
   bool operator ==(other) {
     return other is SourceString && toString() == other.slowToString();
   }
 
@@ skipping 302 matching lines @@
 
 const PrecedenceInfo HEXADECIMAL_INFO =
   const PrecedenceInfo(const SourceString('hexadecimal'), 0, HEXADECIMAL_TOKEN);
 
 const PrecedenceInfo COMMENT_INFO =
   const PrecedenceInfo(const SourceString('comment'), 0, COMMENT_TOKEN);
 
 // For reporting lexical errors.
 const PrecedenceInfo ERROR_INFO =
   const PrecedenceInfo(const SourceString('?'), 0, UNKNOWN_TOKEN);