merge class extensions from patch files

test/generated_sdk/lib/core/string.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.
 
 part of dart.core;
 
 /**
  * A sequence of characters.
  *
  * A string can be either single or multiline. Single line strings are
@@ skipping 578 matching lines @@
    * If the string is already in all upper case, this method returns [:this:].
    *
    *     'alphabet'.toUpperCase(); // 'ALPHABET'
    *     'ABC'.toUpperCase();      // 'ABC'
    *
    * This function uses the language independent Unicode mapping and thus only
    * works in some languages.
    */
   // TODO(floitsch): document better. (See EcmaScript for description).
   String toUpperCase();
+
+  static String _stringFromIterable(Iterable<int> charCodes,
+                                    int start, int end) {
+    if (start < 0) throw new RangeError.range(start, 0, charCodes.length);
+    if (end != null && end < start) {
+      throw new RangeError.range(end, start, charCodes.length);
+    }
+    var it = charCodes.iterator;
+    for (int i = 0; i < start; i++) {
+      if (!it.moveNext()) {
+        throw new RangeError.range(start, 0, i);
+      }
+    }
+    var list = [];
+    if (end == null) {
+      while (it.moveNext()) list.add(it.current);
+    } else {
+      for (int i = start; i < end; i++) {
+        if (!it.moveNext()) {
+          throw new RangeError.range(end, start, i);
+        }
+        list.add(it.current);
+      }
+    }
+    return Primitives.stringFromCharCodes(list);
+  }
 }
 
 /**
  * The runes (integer Unicode code points) of a [String].
  */
 class Runes extends IterableBase<int> {
   final String string;
   Runes(this.string);
 
   RuneIterator get iterator => new RuneIterator(string);
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         _position = position - 1;
         _currentCodePoint = _combineSurrogatePair(prevCodeUnit, codeUnit);
         return true;
       }
     }
     _position = position;
     _currentCodePoint = codeUnit;
     return true;
   }
 }