Revert of Array length reduction should throw in strict mode if it can't delete an element.

src/accessors.cc

Index: src/accessors.cc
diff --git a/src/accessors.cc b/src/accessors.cc
index 31139b79614aaecb47559a3928fd299071be3d26..502dc4c1b256e1027dd2cf8234534da35b38a89e 100644
--- a/src/accessors.cc
+++ b/src/accessors.cc
@@ -204,19 +204,6 @@
   if (JSArray::ObservableSetLength(array, length).is_null()) {
     isolate->OptionalRescheduleException(false);
   }
-
-  if (info.ShouldThrowOnError()) {
-    uint32_t actual_new_len = 0;
-    CHECK(array->length()->ToArrayLength(&actual_new_len));
-    // Throw TypeError if there were non-deletable elements.
-    if (actual_new_len != length) {
-      Factory* factory = isolate->factory();
-      isolate->Throw(*factory->NewTypeError(
-          MessageTemplate::kStrictDeleteProperty,
-          factory->NewNumberFromUint(actual_new_len - 1), array));
-      isolate->OptionalRescheduleException(false);
-    }
-  }
 }
 
 
@@ -1417,7 +1404,6 @@
 static void ModuleSetExport(v8::Local<v8::Name> property,
                             v8::Local<v8::Value> value,
                             const v8::PropertyCallbackInfo<void>& info) {
-  if (!info.ShouldThrowOnError()) return;
   Handle<Name> name = v8::Utils::OpenHandle(*property);
   Isolate* isolate = name->GetIsolate();
   Handle<Object> exception =