isolates refactor: this change introduces 'dart:isolate' as a library. This is a

runtime/vm/bootstrap_natives.cc

Index: runtime/vm/bootstrap_natives.cc
diff --git a/runtime/vm/bootstrap_natives.cc b/runtime/vm/bootstrap_natives.cc
index 2c0d9175ce61d114e86be30aea25fa2ba18a1e73..1fefbd8974490aa214adb1bc120297aaa8f251ab 100644
--- a/runtime/vm/bootstrap_natives.cc
+++ b/runtime/vm/bootstrap_natives.cc
@@ -51,11 +51,20 @@ static Dart_NativeFunction NativeLookup(Dart_Handle name,
 
 
 void Bootstrap::SetupNativeResolver() {
-  Library& library = Library::Handle(Library::CoreLibrary());
+  Isolate* isolate = Isolate::Current();
+  Library& library = Library::Handle();
+
+  library = isolate->object_store()->core_library();
+  ASSERT(!library.IsNull());
+  library.set_native_entry_resolver(
+      reinterpret_cast<Dart_NativeEntryResolver>(NativeLookup));
+
+  library = isolate->object_store()->core_impl_library();
   ASSERT(!library.IsNull());
   library.set_native_entry_resolver(
       reinterpret_cast<Dart_NativeEntryResolver>(NativeLookup));
-  library = Library::CoreImplLibrary();
+
+  library = isolate->object_store()->isolate_library();
   ASSERT(!library.IsNull());
   library.set_native_entry_resolver(
       reinterpret_cast<Dart_NativeEntryResolver>(NativeLookup));