Split function block scoping into a separate flag

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index bca9b98d4d991e00926aea30598011098a3a0a11..78a6f4983c6a154ad60c1fa983c1782fdaeaa079 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1840,6 +1840,7 @@ EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_regexps)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_arrow_functions)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_tostring)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_sloppy)
+EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_sloppy_function)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_sloppy_let)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_unicode_regexps)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_rest_parameters)
@@ -1876,6 +1877,7 @@ EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_array_includes)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_arrow_functions)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_proxies)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_sloppy)
+EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_sloppy_function)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_sloppy_let)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_rest_parameters)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_spreadcalls)
@@ -2558,6 +2560,7 @@ bool Genesis::InstallExperimentalNatives() {
   static const char* harmony_tostring_natives[] = {"native harmony-tostring.js",
                                                    nullptr};
   static const char* harmony_sloppy_natives[] = {nullptr};
+  static const char* harmony_sloppy_function_natives[] = {nullptr};
   static const char* harmony_sloppy_let_natives[] = {nullptr};
   static const char* harmony_unicode_regexps_natives[] = {nullptr};
   static const char* harmony_rest_parameters_natives[] = {nullptr};