Redo "Remove U+180E from whitespace in js_runtime and tests"

tests/corelib_strong/string_trimlr_test.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.
 
 import "package:expect/expect.dart";
 
-// Characters with Whitespace property (Unicode 6.2).
+// Characters with Whitespace property (Unicode 6.3).
 // 0009..000D    ; White_Space # Cc       <control-0009>..<control-000D>
 // 0020          ; White_Space # Zs       SPACE
 // 0085          ; White_Space # Cc       <control-0085>
 // 00A0          ; White_Space # Zs       NO-BREAK SPACE
 // 1680          ; White_Space # Zs       OGHAM SPACE MARK
-// 180E          ; White_Space # Zs       MONGOLIAN VOWEL SEPARATOR
 // 2000..200A    ; White_Space # Zs       EN QUAD..HAIR SPACE
 // 2028          ; White_Space # Zl       LINE SEPARATOR
 // 2029          ; White_Space # Zp       PARAGRAPH SEPARATOR
 // 202F          ; White_Space # Zs       NARROW NO-BREAK SPACE
 // 205F          ; White_Space # Zs       MEDIUM MATHEMATICAL SPACE
 // 3000          ; White_Space # Zs       IDEOGRAPHIC SPACE
 // And BOM:
 // FEFF          ; Byte order mark.
 const WHITESPACE = const [
   0x09,
   0x0A,
   0x0B,
   0x0C,
   0x0D,
   0x20,
   0x85,
   0xA0,
   0x1680,
-  0x180E,
   0x2000,
   0x2001,
   0x2002,
   0x2003,
   0x2004,
   0x2005,
   0x2006,
   0x2007,
   0x2008,
   0x2009,
@@ skipping 51 matching lines @@
     // This line makes string_trimlr_test/none fail but /01 succeede where
     // this bug is in the JS. Both succeede on the VM and where the bug is
     // not. Remove this line and comment if all JS engines fix it.
     if (i == 0x200b) continue;              /// 01: ok
 
     var s = new String.fromCharCode(i);
     Expect.identical(s, s.trimLeft());
     Expect.identical(s, s.trimRight());
   }
 }