[runtime] Remove obsolete Object::IsSpecFunction.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index eddb21e2be579fb1c769b04c179aa1773202349e..89ae2a6536ca331fb8d346b45eafe9484edd6ca9 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -798,7 +798,7 @@ MaybeHandle<Object> Object::GetPropertyWithAccessor(
 
   // Regular accessor.
   Handle<Object> getter(AccessorPair::cast(*structure)->getter(), isolate);
-  if (getter->IsSpecFunction()) {
+  if (getter->IsCallable()) {
     // TODO(rossberg): nicer would be to cast to some JSCallable here...
     return Object::GetPropertyWithDefinedGetter(
         receiver, Handle<JSReceiver>::cast(getter));
@@ -854,7 +854,7 @@ MaybeHandle<Object> Object::SetPropertyWithAccessor(
 
   // Regular accessor.
   Handle<Object> setter(AccessorPair::cast(*structure)->setter(), isolate);
-  if (setter->IsSpecFunction()) {
+  if (setter->IsCallable()) {
     // TODO(rossberg): nicer would be to cast to some JSCallable here...
     return SetPropertyWithDefinedSetter(
         receiver, Handle<JSReceiver>::cast(setter), value);
@@ -6918,8 +6918,8 @@ MaybeHandle<Object> JSObject::DefineAccessor(Handle<JSObject> object,
     }
   }
 
-  DCHECK(getter->IsSpecFunction() || getter->IsUndefined() || getter->IsNull());
-  DCHECK(setter->IsSpecFunction() || setter->IsUndefined() || setter->IsNull());
+  DCHECK(getter->IsCallable() || getter->IsUndefined() || getter->IsNull());
+  DCHECK(setter->IsCallable() || setter->IsUndefined() || setter->IsNull());
   // At least one of the accessors needs to be a new value.
   DCHECK(!getter->IsNull() || !setter->IsNull());
   if (!getter->IsNull()) {