Create frequently used symbols in the vm isolate

vm/symbols.cc

Index: vm/symbols.cc
===================================================================
--- vm/symbols.cc	(revision 0)
+++ vm/symbols.cc	(revision 0)
@@ -0,0 +1,40 @@
+// 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/symbols.h"
+
+#include "vm/isolate.h"
+#include "vm/object.h"
+#include "vm/raw_object.h"
+#include "vm/visitor.h"
+
+namespace dart {
+
+Symbols::Symbols()
+    : dot_(String::null()) {
+}
+
+
+Symbols::~Symbols() {
+}
+
+
+void Symbols::VisitObjectPointers(ObjectPointerVisitor* visitor) {
+  ASSERT(Isolate::Current() == Dart::vm_isolate());
+  ASSERT(visitor != NULL);
+  visitor->VisitPointers(from(), to());
+}
+
+
+void Symbols::Init(Isolate* isolate) {
+  ASSERT(isolate == Dart::vm_isolate());
+  ASSERT(isolate->symbols() == NULL);
+  Symbols* symbols = new Symbols();
+  ASSERT(symbols != NULL);
+  Class::New<OneByteString>();
+  symbols->dot_ = OneByteString::New(".");
+  isolate->set_symbols(symbols);
+}
+
+}  // namespace dart