Don't do any special normalization if a boilerplate contains function literals.

src/parsing/parser-base.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PARSING_PARSER_BASE_H
 #define V8_PARSING_PARSER_BASE_H
 
 #include "src/ast/scopes.h"
 #include "src/bailout-reason.h"
 #include "src/hashmap.h"
@@ skipping 1802 matching lines @@
 template <class Traits>
 typename ParserBase<Traits>::ExpressionT ParserBase<Traits>::ParseObjectLiteral(
     ExpressionClassifier* classifier, bool* ok) {
   // ObjectLiteral ::
   // '{' (PropertyDefinition (',' PropertyDefinition)* ','? )? '}'
 
   int pos = peek_position();
   typename Traits::Type::PropertyList properties =
       this->NewPropertyList(4, zone_);
   int number_of_boilerplate_properties = 0;
-  bool has_function = false;
   bool has_computed_names = false;
   ObjectLiteralChecker checker(this);
 
   Expect(Token::LBRACE, CHECK_OK);
 
   while (peek() != Token::RBRACE) {
     FuncNameInferrer::State fni_state(fni_);
 
     const bool in_class = false;
     const bool is_static = false;
     const bool has_extends = false;
     bool is_computed_name = false;
     IdentifierT name = this->EmptyIdentifier();
     ObjectLiteralPropertyT property = this->ParsePropertyDefinition(
         &checker, in_class, has_extends, is_static, &is_computed_name, NULL,
         classifier, &name, CHECK_OK);
 
     if (is_computed_name) {
       has_computed_names = true;
     }
 
     // Mark top-level object literals that contain function literals and

[adamk, 2016/03/08 19:56:49]

This is probably the comment that gave me that idea :)

     // pretenure the literal so it can be added as a constant function
     // property. (Parser only.)
-    this->CheckFunctionLiteralInsideTopLevelObjectLiteral(scope_, property,
-                                                          &has_function);
+    this->CheckFunctionLiteralInsideTopLevelObjectLiteral(scope_, property);
 
     // Count CONSTANT or COMPUTED properties to maintain the enumeration order.
     if (!has_computed_names && this->IsBoilerplateProperty(property)) {
       number_of_boilerplate_properties++;
     }
     properties->Add(property, zone());
 
     if (peek() != Token::RBRACE) {
       // Need {} because of the CHECK_OK macro.
       Expect(Token::COMMA, CHECK_OK);
     }
 
     if (fni_ != nullptr) fni_->Infer();
 
     if (allow_harmony_function_name()) {
       Traits::SetFunctionNameFromPropertyName(property, name);
     }
   }
   Expect(Token::RBRACE, CHECK_OK);
 
   // Computation of literal_index must happen before pre parse bailout.
   int literal_index = function_state_->NextMaterializedLiteralIndex();
 
   return factory()->NewObjectLiteral(properties,
                                      literal_index,
                                      number_of_boilerplate_properties,
-                                     has_function,
                                      pos);
 }
 
 
 template <class Traits>
 typename Traits::Type::ExpressionList ParserBase<Traits>::ParseArguments(
     Scanner::Location* first_spread_arg_loc, ExpressionClassifier* classifier,
     bool* ok) {
   // Arguments ::
   //   '(' (AssignmentExpression)*[','] ')'
@@ skipping 1482 matching lines @@
     has_seen_constructor_ = true;
     return;
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_BASE_H