Remove pseudo-node from LoadLocalNode and replace it with a proper AST node.

runtime/vm/ast.cc

 // Copyright (c) 2011, 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/ast.h"
 #include "vm/compiler.h"
 #include "vm/dart_entry.h"
 #include "vm/isolate.h"
 #include "vm/object_store.h"
 #include "vm/resolver.h"
@@ skipping 311 matching lines @@
     return local().ConstValue();
   }
   return NULL;
 }
 
 
 AstNode* LoadLocalNode::MakeAssignmentNode(AstNode* rhs) {
   if (local().is_final()) {
     return NULL;
   }
-  if (HasPseudo()) {
-    return NULL;
-  }
   return new StoreLocalNode(token_pos(), &local(), rhs);
 }
 
 
 AstNode* LoadStaticFieldNode::MakeAssignmentNode(AstNode* rhs) {
   if (field().is_final()) {
     return NULL;
   }
   return new StoreStaticFieldNode(token_pos(), field(), rhs);
 }
@@ skipping 88 matching lines @@
   if (result.IsError() || result.IsNull()) {
     // TODO(turnidge): We could get better error messages by returning
     // the Error object directly to the parser.  This will involve
     // replumbing all of the EvalConstExpr methods.
     return NULL;
   }
   return &Instance::ZoneHandle(Instance::Cast(result).raw());
 }
 
 }  // namespace dart