Include metadata in AOT to expand inline frames in stack traces and provide line numbers.

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 7bccb7d2e3efc36dafaa4e52cc84c0c2fd4bf578..1eb2092a34609fc291a3ab2547e7c339caa4b343 100644
--- a/runtime/vm/code_descriptors.cc
+++ b/runtime/vm/code_descriptors.cc
@@ -315,6 +315,24 @@ RawCodeSourceMap* CodeSourceMapBuilder::Finalize() {
 }
 
 
+void CodeSourceMapBuilder::WriteChangePosition(TokenPosition pos) {
+  stream_.Write<uint8_t>(kChangePosition);
+  if (FLAG_precompiled_mode) {
+    intptr_t line = -1;
+    intptr_t inline_id = buffered_inline_id_stack_.Last();
+    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);
+    }
+    stream_.Write<int32_t>(static_cast<int32_t>(line));
+  } else {
+    stream_.Write<int32_t>(static_cast<int32_t>(pos.value()));
+  }
+  written_token_pos_stack_.Last() = pos;
+}
+
+
 void CodeSourceMapReader::GetInlinedFunctionsAt(
     int32_t pc_offset,
     GrowableArray<const Function*>* function_stack,