Fix language/regress_28325 in precompiled mode

runtime/vm/code_descriptors.cc

Index: runtime/vm/code_descriptors.cc
diff --git a/runtime/vm/code_descriptors.cc b/runtime/vm/code_descriptors.cc
index 91d86b78217256a8f44e9ff1fef29576fe288c9c..3922ada243d4c31dda4dafc100a63254654cef72 100644
--- a/runtime/vm/code_descriptors.cc
+++ b/runtime/vm/code_descriptors.cc
@@ -325,7 +325,7 @@ void CodeSourceMapBuilder::WriteChangePosition(TokenPosition pos) {
     if (inline_id < inline_id_to_function_.length()) {
       const Function* function = inline_id_to_function_[inline_id];
       Script& script = Script::Handle(function->script());
-      line = script.GetTokenLineUsingLineStarts(pos);
+      line = script.GetTokenLineUsingLineStarts(pos.SourcePosition());
     }
     stream_.Write<int32_t>(static_cast<int32_t>(line));
   } else {