Change IllegalArgumentException to ArgumentError.

lib/compiler/implementation/lib/coreimpl_patch.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.
 
 // Patch file for dart:coreimpl classes.
 
 // Patch for String implementation.
 // TODO(ager): Split out into date_patch.dart and allow #source
 // in patch files?
 patch class StringImplementation {
   patch static _fromCharCodes(List<int> charCodes) {
     checkNull(charCodes);
     if (!isJsArray(charCodes)) {
-      if (charCodes is !List) throw new IllegalArgumentException(charCodes);
+      if (charCodes is !List) throw new ArgumentError(charCodes);
       charCodes = new List.from(charCodes);
     }
     return Primitives.stringFromCharCodes(charCodes);
   }
 
   patch String join(List<String> strings, String separator) {
     checkNull(strings);
     checkNull(separator);
-    if (separator is !String) throw new IllegalArgumentException(separator);
+    if (separator is !String) throw new ArgumentError(separator);
     return stringJoinUnchecked(_toJsStringArray(strings), separator);
   }
 
   patch String concatAll(List<String> strings) {
     return stringJoinUnchecked(_toJsStringArray(strings), "");
   }
 
   static List _toJsStringArray(List<String> strings) {
     checkNull(strings);
     var array;
     final length = strings.length;
     if (isJsArray(strings)) {
       array = strings;
       for (int i = 0; i < length; i++) {
         final string = strings[i];
         checkNull(string);
-        if (string is !String) throw new IllegalArgumentException(string);
+        if (string is !String) throw new ArgumentError(string);
       }
     } else {
       array = new List(length);
       for (int i = 0; i < length; i++) {
         final string = strings[i];
         checkNull(string);
-        if (string is !String) throw new IllegalArgumentException(string);
+        if (string is !String) throw new ArgumentError(string);
         array[i] = string;
       }
     }
     return array;
   }
 }
 
 
 // Patch for List implementation.
 // TODO(ager): Split out into date_patch.dart and allow #source
@@ skipping 199 matching lines @@
     // hidden global flag.
     _next = _re.firstMatch(_str);
     if (_next == null) {
       _done = true;
       return false;
     } else {
       return true;
     }
   }
 }