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

runtime/vm/bootstrap.cc

 // 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.
 
 #include "vm/bootstrap.h"
 
 #include "include/dart_api.h"
 
 #include "vm/bootstrap_natives.h"
 #include "vm/compiler.h"
@@ skipping 16 matching lines @@
 
 
 RawScript* Bootstrap::LoadCoreScript(bool patch) {
   // TODO(iposva): Use proper library name.
   const char* url = patch ? "dart:core-patch" : "bootstrap";
   const char* source = patch ? corelib_patch_ : corelib_source_;
   return LoadScript(url, source, patch);
 }
 
 
-RawScript* Bootstrap::LoadCoreImplScript(bool patch) {
-  // TODO(iposva): Use proper library name.
-  const char* url = patch ? "dart:coreimpl-patch" : "bootstrap_impl";
-  const char* source = patch ? corelib_impl_patch_ : corelib_impl_source_;
-  return LoadScript(url, source, patch);
-}
-
-
 RawScript* Bootstrap::LoadCollectionScript(bool patch) {
   const char* url = patch ? "dart:collection-patch" : "dart:collection";
   const char* source = patch ? collection_source_ : collection_source_;
   return LoadScript(url, source, patch);
 }
 
 
 RawScript* Bootstrap::LoadMathScript(bool patch) {
   const char* url = patch ? "dart:math-patch" : "dart:math";
   const char* source = patch ? math_patch_ : math_source_;
@@ skipping 32 matching lines @@
   const Error& error = Error::Handle(Compiler::Compile(library, script));
   if (error.IsNull()) {
     library.SetLoaded();
   } else {
     library.SetLoadError();
   }
   return error.raw();
 }
 
 }  // namespace dart