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

sdk/lib/_internal/compiler/implementation/resolution/members.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 resolution;
 
 abstract class TreeElements {
   Element operator[](Node node);
   Selector getSelector(Send send);
   DartType getType(Node node);
@@ skipping 2590 matching lines @@
       new FunctionExpression(new Identifier(element.position()),
                              new NodeList.empty(),
                              new Block(new NodeList.empty()),
                              null, Modifiers.EMPTY, null, null);
   }
 
   isBlackListed(DartType type) {
     LibraryElement lib = element.getLibrary();
     return
       !identical(lib, compiler.coreLibrary) &&
-      !identical(lib, compiler.coreImplLibrary) &&
       !identical(lib, compiler.jsHelperLibrary) &&
       (identical(type.element, compiler.dynamicClass) ||
        identical(type.element, compiler.boolClass) ||
        identical(type.element, compiler.numClass) ||
        identical(type.element, compiler.intClass) ||
        identical(type.element, compiler.doubleClass) ||
        identical(type.element, compiler.stringClass) ||
        identical(type.element, compiler.nullClass) ||
        identical(type.element, compiler.functionClass));
   }
@@ skipping 448 matching lines @@
     return e;
   }
 
   /// Assumed to be called by [resolveRedirectingFactory].
   Element visitReturn(Return node) {
     Node expression = node.expression;
     return finishConstructorReference(visit(expression),
                                       expression, expression);
   }
 }