No need to collect literal counts.

src/parsing/parser.h

Index: src/parsing/parser.h
diff --git a/src/parsing/parser.h b/src/parsing/parser.h
index 7d2c9a30b4b98e2ceadd6ac42c4464f1a5c5aa88..bd5ebfbe51942b733bc0a0329ca58e4324f625dd 100644
--- a/src/parsing/parser.h
+++ b/src/parsing/parser.h
@@ -535,11 +535,13 @@ class V8_EXPORT_PRIVATE Parser : public NON_EXPORTED_BASE(ParserBase<Parser>) {
   // by parsing the function with PreParser. Consumes the ending }.
   // If may_abort == true, the (pre-)parser may decide to abort skipping
   // in order to force the function to be eagerly parsed, after all.
-  LazyParsingResult SkipFunction(
-      FunctionKind kind, DeclarationScope* function_scope, int* num_parameters,
-      int* function_length, bool* has_duplicate_parameters,
-      int* materialized_literal_count, int* expected_property_count,
-      bool is_inner_function, bool may_abort, bool* ok);
+  LazyParsingResult SkipFunction(FunctionKind kind,
+                                 DeclarationScope* function_scope,
+                                 int* num_parameters, int* function_length,
+                                 bool* has_duplicate_parameters,
+                                 int* expected_property_count,
+                                 bool is_inner_function, bool may_abort,
+                                 bool* ok);
 
   Block* BuildParameterInitializationBlock(
       const ParserFormalParameters& parameters, bool* ok);
@@ -550,7 +552,7 @@ class V8_EXPORT_PRIVATE Parser : public NON_EXPORTED_BASE(ParserBase<Parser>) {
       FunctionLiteral::FunctionType function_type,
       DeclarationScope* function_scope, int* num_parameters,
       int* function_length, bool* has_duplicate_parameters,
-      int* materialized_literal_count, int* expected_property_count, bool* ok);
+      int* expected_property_count, bool* ok);
 
   void ThrowPendingError(Isolate* isolate, Handle<Script> script);
 
@@ -1084,8 +1086,6 @@ class V8_EXPORT_PRIVATE Parser : public NON_EXPORTED_BASE(ParserBase<Parser>) {
     return tag != NULL;
   }
 
-  V8_INLINE void MaterializeUnspreadArgumentsLiterals(int count) {}
-
   Expression* ExpressionListToExpression(ZoneList<Expression*>* args);
 
   void AddAccessorPrefixToFunctionName(bool is_get, FunctionLiteral* function,