Support for precise stepping in functions compiled before debugging was started (step 1)

src/full-codegen.cc

Index: src/full-codegen.cc
diff --git a/src/full-codegen.cc b/src/full-codegen.cc
index fc7b6899bcbffb29127b009fe5ffceff22ff3908..610990451a860089cc15eeb54d8e5ca8b2bd0fc2 100644
--- a/src/full-codegen.cc
+++ b/src/full-codegen.cc
@@ -296,6 +296,8 @@ bool FullCodeGenerator::MakeCode(CompilationInfo* info) {
   code->set_optimizable(info->IsOptimizable());
   cgen.PopulateDeoptimizationData(code);
   code->set_has_deoptimization_support(info->HasDeoptimizationSupport());
+  code->set_has_debug_break_slots(
+      info->isolate()->debugger()->IsDebuggerActive());
   code->set_allow_osr_at_loop_nesting_level(0);
   code->set_stack_check_table_offset(table_offset);
   CodeGenerator::PrintCode(code, info);