Cleanup API property handling

BUG=v8:4137
LOG=n

Review URL: https://codereview.chromium.org/1226473003

Cr-Commit-Position: refs/heads/master@{#29444}

src/api.cc

@@ -3566,16 +3566,9 @@ static i::MaybeHandle<i::Object> DefineObjectProperty(
   }
 
   i::Handle<i::Name> name;
-  if (key->IsName()) {
-    name = i::Handle<i::Name>::cast(key);
-  } else {
-    // Call-back into JavaScript to convert the key to a string.
-    i::Handle<i::Object> converted;
-    ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, converted,
-                                     i::Execution::ToString(isolate, key),
+  ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, name,
+                                   i::Runtime::ToName(isolate, key),
                                    i::MaybeHandle<i::Object>());
-    name = i::Handle<i::String>::cast(converted);
-  }
 
   return i::JSObject::DefinePropertyOrElementIgnoreAttributes(js_object, name,
                                                               value, attrs);
@@ -3614,44 +3607,24 @@ bool v8::Object::ForceSet(v8::Handle<Value> key, v8::Handle<Value> value,
 }
 
 
-namespace {
-
-i::MaybeHandle<i::Object> DeleteObjectProperty(
+MUST_USE_RESULT
+static i::MaybeHandle<i::Object> DeleteObjectProperty(
     i::Isolate* isolate, i::Handle<i::JSReceiver> receiver,
     i::Handle<i::Object> key, i::LanguageMode language_mode) {
   // Check if the given key is an array index.
   uint32_t index = 0;
   if (key->ToArrayIndex(&index)) {
-    // In Firefox/SpiderMonkey, Safari and Opera you can access the
-    // characters of a string using [] notation.  In the case of a
-    // String object we just need to redirect the deletion to the
-    // underlying string if the index is in range.  Since the
-    // underlying string does nothing with the deletion, we can ignore
-    // such deletions.
-    if (receiver->IsStringObjectWithCharacterAt(index)) {
-      return isolate->factory()->false_value();
-    }
-
     return i::JSReceiver::DeleteElement(receiver, index, language_mode);
   }
 
   i::Handle<i::Name> name;
-  if (key->IsName()) {
-    name = i::Handle<i::Name>::cast(key);
-  } else {
-    // Call-back into JavaScript to convert the key to a string.
-    i::Handle<i::Object> converted;
-    if (!i::Execution::ToString(isolate, key).ToHandle(&converted)) {
-      return i::MaybeHandle<i::Object>();
-    }
-    name = i::Handle<i::String>::cast(converted);
-  }
+  ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, name,
+                                   i::Runtime::ToName(isolate, key),
+                                   i::MaybeHandle<i::Object>());
 
-  return i::JSReceiver::DeleteProperty(receiver, name, language_mode);
+  return i::JSReceiver::DeletePropertyOrElement(receiver, name, language_mode);
 }
 
-}  // namespace
-
 
 MaybeLocal<Value> v8::Object::Get(Local<v8::Context> context,
                                   Local<Value> key) {

src/objects.cc

@@ -5288,6 +5288,13 @@ MaybeHandle<Object> JSReceiver::DeleteElement(Handle<JSReceiver> object,
 MaybeHandle<Object> JSReceiver::DeleteProperty(Handle<JSReceiver> object,
                                                Handle<Name> name,
                                                LanguageMode language_mode) {
+  LookupIterator it(object, name, LookupIterator::HIDDEN);
+  return JSObject::DeleteProperty(&it, language_mode);
+}
+
+
+MaybeHandle<Object> JSReceiver::DeletePropertyOrElement(
+    Handle<JSReceiver> object, Handle<Name> name, LanguageMode language_mode) {
   LookupIterator it = LookupIterator::PropertyOrElement(
       name->GetIsolate(), object, name, LookupIterator::HIDDEN);
   return JSObject::DeleteProperty(&it, language_mode);

src/objects.h

@@ -1687,6 +1687,9 @@ class JSReceiver: public HeapObject {
       Handle<JSReceiver> object, uint32_t index);
 
   // Implementation of [[Delete]], ECMA-262 5th edition, section 8.12.7.
+  MUST_USE_RESULT static MaybeHandle<Object> DeletePropertyOrElement(
+      Handle<JSReceiver> object, Handle<Name> name,
+      LanguageMode language_mode = SLOPPY);
   MUST_USE_RESULT static MaybeHandle<Object> DeleteProperty(
       Handle<JSReceiver> object, Handle<Name> name,
       LanguageMode language_mode = SLOPPY);

src/runtime/runtime-object.cc

@@ -596,7 +596,8 @@ RUNTIME_FUNCTION(Runtime_DeleteProperty) {
   CONVERT_LANGUAGE_MODE_ARG_CHECKED(language_mode, 2);
   Handle<Object> result;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-      isolate, result, JSReceiver::DeleteProperty(object, key, language_mode));
+      isolate, result,
+      JSReceiver::DeletePropertyOrElement(object, key, language_mode));
   return *result;
 }