Reland "[strong] Object literals create strong objects"

src/preparser.h

Index: src/preparser.h
diff --git a/src/preparser.h b/src/preparser.h
index c870c9bf5e55851371d2649599b9c3b887b2408a..b08888834eb9ba4a42c557f8cd2d3dfa849c9520 100644
--- a/src/preparser.h
+++ b/src/preparser.h
@@ -1372,11 +1372,13 @@ class PreParserFactory {
   PreParserExpression NewRegExpLiteral(PreParserIdentifier js_pattern,
                                        PreParserIdentifier js_flags,
                                        int literal_index,
+                                       bool is_strong,
                                        int pos) {
     return PreParserExpression::Default();
   }
   PreParserExpression NewArrayLiteral(PreParserExpressionList values,
                                       int literal_index,
+                                      bool is_strong,
                                       int pos) {
     return PreParserExpression::Default();
   }
@@ -1397,6 +1399,7 @@ class PreParserFactory {
                                        int literal_index,
                                        int boilerplate_properties,
                                        bool has_function,
+                                       bool is_strong,
                                        int pos) {
     return PreParserExpression::Default();
   }
@@ -2250,7 +2253,8 @@ typename ParserBase<Traits>::ExpressionT ParserBase<Traits>::ParseRegExpLiteral(
   }
   IdentifierT js_flags = this->GetNextSymbol(scanner());
   Next();
-  return factory()->NewRegExpLiteral(js_pattern, js_flags, literal_index, pos);
+  return factory()->NewRegExpLiteral(js_pattern, js_flags, literal_index,
+                                     is_strong(language_mode()), pos);
 }
 
 
@@ -2515,7 +2519,8 @@ typename ParserBase<Traits>::ExpressionT ParserBase<Traits>::ParseArrayLiteral(
   // Update the scope information before the pre-parsing bailout.
   int literal_index = function_state_->NextMaterializedLiteralIndex();
 
-  return factory()->NewArrayLiteral(values, literal_index, pos);
+  return factory()->NewArrayLiteral(values, literal_index,
+                                    is_strong(language_mode()), pos);
 }
 
 
@@ -2784,6 +2789,7 @@ typename ParserBase<Traits>::ExpressionT ParserBase<Traits>::ParseObjectLiteral(
                                      literal_index,
                                      number_of_boilerplate_properties,
                                      has_function,
+                                     is_strong(language_mode()),
                                      pos);
 }