[debugger] use source position to identify break points.

src/objects-printer.cc

Index: src/objects-printer.cc
diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index 9aa51aa9a153b9c0161aa37a377b56b1586fafe6..632316097d76582741e6781f52dd2e23a6f0153b 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -1286,9 +1286,7 @@ void DebugInfo::DebugInfoPrint(std::ostream& os) {  // NOLINT
 
 void BreakPointInfo::BreakPointInfoPrint(std::ostream& os) {  // NOLINT
   HeapObject::PrintHeader(os, "BreakPointInfo");
-  os << "\n - code_offset: " << code_offset();
   os << "\n - source_position: " << source_position();
-  os << "\n - statement_position: " << statement_position();
   os << "\n - break_point_objects: " << Brief(break_point_objects());
   os << "\n";
 }