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

vm/object_store.cc

Index: vm/object_store.cc
===================================================================
--- vm/object_store.cc	(revision 4719)
+++ vm/object_store.cc	(working copy)
@@ -54,6 +54,7 @@
     empty_context_(Context::null()),
     stack_overflow_(Instance::null()),
     out_of_memory_(Instance::null()),
+    keyword_symbols_(Array::null()),
     preallocate_objects_called_(false) {
 }
 
@@ -104,6 +105,16 @@
 }
 
 
+void ObjectStore::InitKeywordTable() {
+  // Set up the keywords symbol array so that we can access it while scanning.
+  Array& keywords = Array::Handle(keyword_symbols());
+  ASSERT(keywords.IsNull());
+  keywords = Array::New(Token::numKeywords, Heap::kOld);
+  ASSERT(!keywords.IsError() && !keywords.IsNull());
+  set_keyword_symbols(keywords);
+}
+
+
 RawClass* ObjectStore::GetClass(int index) {
   switch (index) {
     case kObjectClass: return object_class_;