[debugger] flood function for stepping before calling it.

src/ic/x64/handler-compiler-x64.cc

Index: src/ic/x64/handler-compiler-x64.cc
diff --git a/src/ic/x64/handler-compiler-x64.cc b/src/ic/x64/handler-compiler-x64.cc
index 09b8f7b0b80c410b001348cfc97576695f35ed48..708311e3dbcb70817b3030722843e2974be4e8e5 100644
--- a/src/ic/x64/handler-compiler-x64.cc
+++ b/src/ic/x64/handler-compiler-x64.cc
@@ -249,7 +249,7 @@ void NamedStoreHandlerCompiler::GenerateStoreViaSetter(
       ParameterCount expected(expected_arguments);
       __ LoadAccessor(rdi, holder, accessor_index, ACCESSOR_SETTER);
       __ InvokeFunction(rdi, no_reg, expected, actual, CALL_FUNCTION,
-                        NullCallWrapper());
+                        CheckDebugStepCallWrapper());
     } else {
       // If we generate a global code snippet for deoptimization only, remember
       // the place to continue after deoptimization.
@@ -292,7 +292,7 @@ void NamedLoadHandlerCompiler::GenerateLoadViaGetter(
       ParameterCount expected(expected_arguments);
       __ LoadAccessor(rdi, holder, accessor_index, ACCESSOR_GETTER);
       __ InvokeFunction(rdi, no_reg, expected, actual, CALL_FUNCTION,
-                        NullCallWrapper());
+                        CheckDebugStepCallWrapper());
     } else {
       // If we generate a global code snippet for deoptimization only, remember
       // the place to continue after deoptimization.