Add a new implementation of HashMap that uses JS objects for its (multiple) hash tables.

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 25 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::LoadCollectionScript(bool patch) {
   const char* url = patch ? "dart:collection-patch" : "dart:collection";
-  const char* source = patch ? collection_source_ : collection_source_;

[erikcorry, 2013/03/22 12:59:24]

Strange code is strange.

+  const char* source = patch ? collection_patch_ : collection_source_;
   return LoadScript(url, source, patch);
 }
 
 
 RawScript* Bootstrap::LoadCollectionDevScript(bool patch) {
   const char* url =
       patch ? "dart:_collection-dev-patch" : "dart:_collection-dev";
   const char* source = patch ? collection_dev_source_ : collection_dev_source_;
   return LoadScript(url, source, patch);
 }
@@ skipping 72 matching lines @@
   const Error& error = Error::Handle(Compiler::Compile(library, script));
   if (error.IsNull()) {
     library.SetLoaded();
   } else {
     library.SetLoadError();
   }
   return error.raw();
 }
 
 }  // namespace dart