Remove all harmony runtime flags which shipped in M51

src/runtime/runtime-object.cc

Index: src/runtime/runtime-object.cc
diff --git a/src/runtime/runtime-object.cc b/src/runtime/runtime-object.cc
index d16fad8c1a2b6d2f2098caace96a376cf885830d..d8da0feade376bcfa1821299357ba6e0bd481365 100644
--- a/src/runtime/runtime-object.cc
+++ b/src/runtime/runtime-object.cc
@@ -725,7 +725,7 @@ RUNTIME_FUNCTION(Runtime_DefineDataPropertyInLiteral) {
   CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 3);
   CONVERT_SMI_ARG_CHECKED(set_function_name, 4);
 
-  if (FLAG_harmony_function_name && set_function_name) {
+  if (set_function_name) {
     DCHECK(value->IsJSFunction());
     JSFunction::SetName(Handle<JSFunction>::cast(value), name,
                         isolate->factory()->empty_string());
@@ -794,8 +794,7 @@ RUNTIME_FUNCTION(Runtime_DefineGetterPropertyUnchecked) {
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, getter, 2);
   CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 3);
 
-  if (FLAG_harmony_function_name &&
-      String::cast(getter->shared()->name())->length() == 0) {
+  if (String::cast(getter->shared()->name())->length() == 0) {
     JSFunction::SetName(getter, name, isolate->factory()->get_string());
   }
 
@@ -815,8 +814,7 @@ RUNTIME_FUNCTION(Runtime_DefineSetterPropertyUnchecked) {
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, setter, 2);
   CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 3);
 
-  if (FLAG_harmony_function_name &&
-      String::cast(setter->shared()->name())->length() == 0) {
+  if (String::cast(setter->shared()->name())->length() == 0) {
     JSFunction::SetName(setter, name, isolate->factory()->set_string());
   }