Add read only handles for the following predefined symbols

vm/ast.h

 // 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.
 
 #ifndef VM_AST_H_
 #define VM_AST_H_
 
 #include "platform/assert.h"
 #include "vm/allocation.h"
 #include "vm/growable_array.h"
@@ skipping 285 matching lines @@
   GrowableArray<AstNode*> elements_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ArrayNode);
 };
 
 
 class LiteralNode : public AstNode {
  public:
   LiteralNode(intptr_t token_pos, const Instance& literal)
       : AstNode(token_pos), literal_(literal) {
-    ASSERT(literal_.IsZoneHandle());
+    ASSERT(literal_.IsNotTemporaryScopedHandle());
     ASSERT(literal_.IsSmi() || literal_.IsOld());
 #if defined(DEBUG)
     if (literal_.IsString()) {
       ASSERT(String::Cast(literal_).IsSymbol());
     }
 #endif  // defined(DEBUG)
     ASSERT(literal_.IsNull() ||
            Class::Handle(literal_.clazz()).is_finalized() ||
            Class::Handle(literal_.clazz()).is_prefinalized());
   }
@@ skipping 1373 matching lines @@
   const LocalVariable& context_var_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(InlinedFinallyNode);
 };
 
 }  // namespace dart
 
 #undef DECLARE_COMMON_NODE_FUNCTIONS
 
 #endif  // VM_AST_H_