Add a mode to completely deserialize scope chains

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/base/hashmap.h"
@@ skipping 236 matching lines @@
   ALLOW_ACCESSORS(harmony_trailing_commas);
   SCANNER_ACCESSORS(harmony_exponentiation_operator);
 
 #undef SCANNER_ACCESSORS
 #undef ALLOW_ACCESSORS
 
   uintptr_t stack_limit() const { return stack_limit_; }
 
   void set_stack_limit(uintptr_t stack_limit) { stack_limit_ = stack_limit; }
 
+  Scope* NewScriptScope() {
+    return new (zone()) Scope(zone(), nullptr, SCRIPT_SCOPE, kNormalFunction);
+  }
+
  protected:
   enum AllowRestrictedIdentifiers {
     kAllowRestrictedIdentifiers,
     kDontAllowRestrictedIdentifiers
   };
 
   enum Mode {
     PARSE_LAZILY,
     PARSE_EAGERLY
   };
@@ skipping 341 matching lines @@
     }
     ~ParsingModeScope() {
       parser_->mode_ = old_mode_;
     }
 
    private:
     ParserBase* parser_;
     Mode old_mode_;
   };
 
-  Scope* NewScriptScope() {
-    return new (zone()) Scope(zone(), nullptr, SCRIPT_SCOPE, kNormalFunction);
-  }
-
   Scope* NewScope(ScopeType scope_type) {
     return NewScopeWithParent(scope(), scope_type);
   }
 
   // This constructor should only be used when absolutely necessary. Most scopes
   // should automatically use scope() as parent, and be fine with
   // NewScope(ScopeType) above.
   Scope* NewScopeWithParent(Scope* parent, ScopeType scope_type) {
     // Must always use the specific constructors for the blacklisted scope
     // types.
@@ skipping 3045 matching lines @@
     has_seen_constructor_ = true;
     return;
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_BASE_H