Move JSSyntaxRegExp to core as a private member. This removes the last refrences to dart:coreimpl.

tools/create_sdk.py

 #!/usr/bin/env python
 #
 # 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.
 #
 # A script which will be invoked from gyp to create an SDK.
 #
 # Usage: create_sdk.py sdk_directory
 #
 # The SDK will be used either from the command-line or from the editor.
 # Top structure is
 #
 # ..dart-sdk/
 # ....bin/
 # ......dart or dart.exe (executable)
 # ......dart.lib (import library for VM native extensions on Windows)
 # ......dart2js
 # ......dart_analyzer
 # ......pub
 # ....include/
 # ......dart_api.h
 # ......dart_debugger_api.h
 # ....lib/
 # ......_internal/
 # ......collection/
 # ......core/
-# ......coreimpl/
 # ......crypto/
 # ......html/
 # ......io/
 # ......isolate/
 # ......json/
 # ......math/
 # ......mirrors/
 # ......uri/
 # ......utf/
 # ......scalarlist/
@@ skipping 159 matching lines @@
   #
 
   LIB = join(SDK_tmp, 'lib')
   os.makedirs(LIB)
 
   #
   # Create and populate lib/{core, crypto, isolate, json, uri, utf, ...}.
   #
 
   os.makedirs(join(LIB, 'html'))
-  for library in ['_internal', 'collection', 'core', 'coreimpl', 'crypto', 'io',
-                  'isolate', join('html', 'dart2js'), join('html', 'dartium'),
-                  'json', 'math', 'mirrors', 'scalarlist', 'uri', 'utf']:
+  for library in ['_internal', 'collection', 'core', 'crypto', 'io', 'isolate',
+                  join('html', 'dart2js'), join('html', 'dartium'), 'json',
+                  'math', 'mirrors', 'scalarlist', 'uri', 'utf']:
     copytree(join(HOME, 'sdk', 'lib', library), join(LIB, library),
              ignore=ignore_patterns('*.svn', 'doc', '*.py', '*.gypi', '*.sh'))
 
 
   # Create and copy pkg.
   PKG = join(SDK_tmp, 'pkg')
   os.makedirs(PKG)
 
   #
   # Create and populate pkg/{args, intl, logging, meta, unittest}
@@ skipping 82 matching lines @@
     with open(os.path.join(SDK_tmp, 'revision'), 'w') as f:
       f.write(revision + '\n')
       f.close()
 
   Copy(join(HOME, 'README.dart-sdk'), join(SDK_tmp, 'README'))
 
   move(SDK_tmp, SDK)
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv))