Replace intptr_t with TokenDescriptor

runtime/vm/ast.cc

Index: runtime/vm/ast.cc
diff --git a/runtime/vm/ast.cc b/runtime/vm/ast.cc
index 2deefa29ca5166210d6db5ba98e2943765b116f7..69e1e5bfd2c7b6e54934c152171cc0416b413eae 100644
--- a/runtime/vm/ast.cc
+++ b/runtime/vm/ast.cc
@@ -91,7 +91,7 @@ void ArgumentListNode::VisitChildren(AstNodeVisitor* visitor) const {
 }
 
 
-LetNode::LetNode(intptr_t token_pos)
+LetNode::LetNode(TokenDescriptor token_pos)
   : AstNode(token_pos),
     vars_(1),
     initializers_(1),
@@ -102,7 +102,7 @@ LocalVariable* LetNode::AddInitializer(AstNode* node) {
   initializers_.Add(node);
   char name[64];
   OS::SNPrint(name, sizeof(name), ":lt%" Pd "_%" Pd "",
-      token_pos(), vars_.length());
+      token_pos().value(), vars_.length());
   LocalVariable* temp_var =
       new LocalVariable(token_pos(),
                         String::ZoneHandle(Symbols::New(name)),
@@ -433,7 +433,7 @@ const Instance* BinaryOpNode::EvalConstExpr() const {
 }
 
 
-AstNode* UnaryOpNode::UnaryOpOrLiteral(intptr_t token_pos,
+AstNode* UnaryOpNode::UnaryOpOrLiteral(TokenDescriptor token_pos,
                                        Token::Kind kind,
                                        AstNode* operand) {
   AstNode* new_operand = operand->ApplyUnaryOp(kind);