VM: Use read-only handle Object::dynamic_type() where possible.

runtime/vm/scopes.cc

 // 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/scopes.h"
 
 #include "vm/object.h"
 #include "vm/stack_frame.h"
 #include "vm/symbols.h"
 
@@ skipping 558 matching lines @@
 LocalScope* LocalScope::RestoreOuterScope(const ContextScope& context_scope) {
   // The function level of the outer scope is one less than the function level
   // of the current function, which is 0.
   LocalScope* outer_scope = new LocalScope(NULL, -1, 0);
   // Add all variables as aliases to the outer scope.
   for (int i = 0; i < context_scope.num_variables(); i++) {
     LocalVariable* variable;
     if (context_scope.IsConstAt(i)) {
       variable = new LocalVariable(context_scope.TokenIndexAt(i),
           String::ZoneHandle(context_scope.NameAt(i)),
-          AbstractType::ZoneHandle(Type::DynamicType()));
+          Object::dynamic_type());
       variable->SetConstValue(
           Instance::ZoneHandle(context_scope.ConstValueAt(i)));
     } else {
       variable = new LocalVariable(context_scope.TokenIndexAt(i),
           String::ZoneHandle(context_scope.NameAt(i)),
           AbstractType::ZoneHandle(context_scope.TypeAt(i)));
     }
     variable->set_is_captured();
     variable->set_index(context_scope.ContextIndexAt(i));
     if (context_scope.IsFinalAt(i)) {
@@ skipping 78 matching lines @@
     return fixed_parameter_count - (index() - kParamEndSlotFromFp);
   } else {
     // Shift negative indexes so that the lowest one is 0 (they are still
     // non-positive).
     return fixed_parameter_count - (index() - kFirstLocalSlotFromFp);
   }
 }
 
 
 }  // namespace dart