1 files changed, 5 insertions, 7 deletions
diff --git a/deps/v8/src/ast/ast.cc b/deps/v8/src/ast/ast.cc
index 9987eb2844..4b6c4805de 100644
--- a/deps/v8/src/ast/ast.cc
+++ b/deps/v8/src/ast/ast.cc
@@ -122,6 +122,10 @@ bool Expression::IsUndefinedLiteral() const {
          var_proxy->raw_name()->IsOneByteEqualTo("undefined");
 }
 
+bool Expression::IsLiteralButNotNullOrUndefined() const {
+  return IsLiteral() && !IsNullOrUndefinedLiteral();
+}
+
 bool Expression::ToBooleanIsTrue() const {
   return IsLiteral() && AsLiteral()->ToBooleanIsTrue();
 }
@@ -217,13 +221,7 @@ bool FunctionLiteral::AllowsLazyCompilation() {
 }
 
 bool FunctionLiteral::SafeToSkipArgumentsAdaptor() const {
-  // TODO(bmeurer,verwaest): The --fast_calls_with_arguments_mismatches
-  // is mostly here for checking the real-world impact of the calling
-  // convention. There's not really a point in turning off this flag
-  // otherwise, so we should remove it at some point, when we're done
-  // with the experiments (https://crbug.com/v8/8895).
-  return FLAG_fast_calls_with_arguments_mismatches &&
-         language_mode() == LanguageMode::kStrict &&
+  return language_mode() == LanguageMode::kStrict &&
          scope()->arguments() == nullptr &&
          scope()->rest_parameter() == nullptr;
 }