Changes to shrink the token stream representation from two words to one word.

vm/raw_object.cc

Index: vm/raw_object.cc
===================================================================
--- vm/raw_object.cc	(revision 4579)
+++ vm/raw_object.cc	(working copy)
@@ -302,6 +302,13 @@
 }
 
 
+intptr_t RawLiteralToken::VisitLiteralTokenPointers(
+    RawLiteralToken* raw_obj, ObjectPointerVisitor* visitor) {
+  visitor->VisitPointers(raw_obj->from(), raw_obj->to());
+  return LiteralToken::InstanceSize();
+}
+
+
 intptr_t RawTokenStream::VisitTokenStreamPointers(
     RawTokenStream* raw_obj, ObjectPointerVisitor* visitor) {
   intptr_t length = Smi::Value(raw_obj->ptr()->length_);