[ast] Simplify FetchFreeVariables.

src/ast/scopes.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_AST_SCOPES_H_
 #define V8_AST_SCOPES_H_
 
 #include "src/base/compiler-specific.h"
 #include "src/base/hashmap.h"
 #include "src/globals.h"
@@ skipping 502 matching lines @@
   // scope, and stopping when reaching the outer_scope_end scope. If the code is
   // executed because of a call to 'eval', the context parameter should be set
   // to the calling context of 'eval'.
   Variable* LookupRecursive(VariableProxy* proxy, Scope* outer_scope_end);
   void ResolveTo(ParseInfo* info, VariableProxy* proxy, Variable* var);
   void ResolveVariable(ParseInfo* info, VariableProxy* proxy);
   void ResolveVariablesRecursively(ParseInfo* info);
 
   // Finds free variables of this scope. This mutates the unresolved variables
   // list along the way, so full resolution cannot be done afterwards.
-  // If a ParseInfo* is passed, non-free variables will be resolved.
   VariableProxy* FetchFreeVariables(DeclarationScope* max_outer_scope,
                                     bool try_to_resolve = true,
-                                    ParseInfo* info = nullptr,
                                     VariableProxy* stack = nullptr);
 
   // Predicates.
   bool MustAllocate(Variable* var);
   bool MustAllocateInContext(Variable* var);
 
   // Variable allocation.
   void AllocateStackSlot(Variable* var);
   void AllocateHeapSlot(Variable* var);
   void AllocateNonParameterLocal(Variable* var);
@@ skipping 317 matching lines @@
   void AllocateModuleVariables();
 
  private:
   ModuleDescriptor* module_descriptor_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_SCOPES_H_