[debugger] use source position to identify break points.

src/objects-printer.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/objects.h"
 
 #include <iomanip>
 #include <memory>
 
 #include "src/disasm.h"
@@ skipping 1268 matching lines @@
   HeapObject::PrintHeader(os, "DebugInfo");
   os << "\n - shared: " << Brief(shared());
   os << "\n - code: " << Brief(abstract_code());
   os << "\n - break_points: ";
   break_points()->Print(os);
 }
 
 
 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";
 }
 
 
 static void PrintBitMask(std::ostream& os, uint32_t value) {  // NOLINT
   for (int i = 0; i < 32; i++) {
     if ((i & 7) == 0) os << " ";
     os << (((value & 1) == 0) ? "_" : "x");
     value >>= 1;
@@ skipping 201 matching lines @@
     printf("Not a transition array\n");
   } else {
     reinterpret_cast<i::TransitionArray*>(object)->Print();
   }
 }
 
 extern void _v8_internal_Print_StackTrace() {
   i::Isolate* isolate = i::Isolate::Current();
   isolate->PrintStack(stdout);
 }