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

runtime/vm/bootstrap.cc

Index: runtime/vm/bootstrap.cc
diff --git a/runtime/vm/bootstrap.cc b/runtime/vm/bootstrap.cc
index 8c1d68c0e5bf7e0b0b68330045e8fc0e28646da0..958fa949e4c96d7ab229e564768ad63d321596fe 100644
--- a/runtime/vm/bootstrap.cc
+++ b/runtime/vm/bootstrap.cc
@@ -38,6 +38,40 @@ RawScript* Bootstrap::LoadImplScript() {
 }
 
 
+static RawObject* InitLibrary(const char* url_str, const char* source_str) {
+  const String& url = String::Handle(String::NewSymbol(url_str));
+  const String& source = String::Handle(String::New(source_str, Heap::kOld));
+  const Library& lib = Library::Handle(Library::New(url));
+  lib.Register();
+  const Script& script =
+      Script::Handle(Script::New(url, source, RawScript::kSource));
+  const Error& error = Error::Handle(Bootstrap::Compile(lib, script));
+  if (!error.IsNull()) {
+    return error.raw();
+  } else {
+    return lib.raw();
+  }
+}
+
+
+RawError* Bootstrap::InitAdditionalLibraries() {
+  Object& result = Object::Handle();
+
+  result = InitLibrary("dart:isolate", isolate_source_);
+  if (result.IsError()) {
+    Error& error = Error::Handle();
+    error ^= result.raw();
+    return error.raw();
+  } else {
+    Library& lib = Library::Handle();
+    lib ^= result.raw();
+    Isolate::Current()->object_store()->set_isolate_library(lib);
+  }
+
+  return Error::null();
+}
+
+
 RawError* Bootstrap::Compile(const Library& library, const Script& script) {
   if (FLAG_print_bootstrap) {
     OS::Print("Bootstrap source '%s':\n%s\n",
@@ -48,6 +82,8 @@ RawError* Bootstrap::Compile(const Library& library, const Script& script) {
   const Error& error = Error::Handle(Compiler::Compile(library, script));
   if (error.IsNull()) {
     library.SetLoaded();
+  } else {
+    library.SetLoadError();
   }
   return error.raw();
 }