[runtime] Remove obsolete Object::IsSpecFunction.

We don't need Object::IsSpecFunction anymore, since it only checks for
JSFunction and JSFunctionProxy, but what you actually want to check for
(in case of accessors) is whether the target has a [[Call]] internal
method, which is exactly what Object::IsCallable does.

CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_layout_dbg,v8_linux_nosnap_dbg
R=rossberg@chromium.org
BUG=v8:4413
LOG=n

Review URL: https://codereview.chromium.org/1358403002

Cr-Commit-Position: refs/heads/master@{#30875}

src/objects-inl.h

@@ -198,14 +198,6 @@ bool Object::IsSpecObject() const {
 }
 
 
-// TODO(rossberg): Remove this and use the spec compliant IsCallable instead.
-bool Object::IsSpecFunction() const {
-  if (!Object::IsHeapObject()) return false;
-  InstanceType type = HeapObject::cast(this)->map()->instance_type();
-  return type == JS_FUNCTION_TYPE || type == JS_FUNCTION_PROXY_TYPE;
-}
-
-
 bool Object::IsTemplateInfo() const {
   return IsObjectTemplateInfo() || IsFunctionTemplateInfo();
 }
@@ -7359,7 +7351,7 @@ bool AccessorPair::ContainsAccessor() {
 
 
 bool AccessorPair::IsJSAccessor(Object* obj) {
-  return obj->IsSpecFunction() || obj->IsUndefined();
+  return obj->IsCallable() || obj->IsUndefined();
 }
 
 

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()) {

src/objects.h

@@ -1034,8 +1034,6 @@ class Object {
   INLINE(bool IsCallable() const);
 
   INLINE(bool IsSpecObject()) const;
-  // TODO(rossberg): IsSpecFunction should be removed in favor of IsCallable.
-  INLINE(bool IsSpecFunction()) const;
   INLINE(bool IsTemplateInfo()) const;
   INLINE(bool IsNameDictionary() const);
   INLINE(bool IsGlobalDictionary() const);

src/runtime/runtime-object.cc

@@ -1204,7 +1204,7 @@ RUNTIME_FUNCTION(Runtime_IsJSGlobalProxy) {
 
 
 static bool IsValidAccessor(Handle<Object> obj) {
-  return obj->IsUndefined() || obj->IsSpecFunction() || obj->IsNull();
+  return obj->IsUndefined() || obj->IsCallable() || obj->IsNull();
 }