Replace intptr_t with TokenDescriptor

runtime/vm/ast_printer.cc

Index: runtime/vm/ast_printer.cc
diff --git a/runtime/vm/ast_printer.cc b/runtime/vm/ast_printer.cc
index 7cc69d4596a90ca00f053a3f8f30dda3b2046b34..ef3bddc14a57f3b6feab2fc0c5316ce9cfd9cfe9 100644
--- a/runtime/vm/ast_printer.cc
+++ b/runtime/vm/ast_printer.cc
@@ -31,8 +31,8 @@ void AstPrinter::VisitSequenceNode(SequenceNode* node) {
   THR_Print("(%s (scope \"%p\"", node->PrettyName(), scope);
   if (scope != NULL) {
     THR_Print(" (%" Pd "-%" Pd ") loop %d",
-              scope->begin_token_pos(),
-              scope->end_token_pos(),
+              scope->begin_token_pos().value(),
+              scope->end_token_pos().value(),
               scope->loop_level());
     if (scope->HasContextLevel()) {
       THR_Print(" context %d captures %d",
@@ -479,8 +479,8 @@ void AstPrinter::PrintLocalScopeVariable(const LocalScope* scope,
     THR_Print(" lev %d", var->owner()->function_level());
   }
   THR_Print(" valid %" Pd "-%" Pd ")\n",
-            var->token_pos(),
-            scope->end_token_pos());
+            var->token_pos().value(),
+            scope->end_token_pos().value());
 }
 
 
@@ -552,8 +552,8 @@ void AstPrinter::PrintFunctionScope(const ParsedFunction& parsed_function) {
       }
     }
     THR_Print(" valid %" Pd "-%" Pd ")\n",
-              param->token_pos(),
-              scope->end_token_pos());
+              param->token_pos().value(),
+              scope->end_token_pos().value());
     pos++;
   }
   // Visit remaining non-parameter variables and children scopes.