Remove synthetic unresolved variables from async/await desugaring

src/parsing/parser.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_H_
 #define V8_PARSING_PARSER_H_
 
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
 #include "src/parsing/parser-base.h"
@@ skipping 125 matching lines @@
 
   int Arity() const { return params.length(); }
   const Parameter& at(int i) const { return params[i]; }
 };
 
 template <>
 struct ParserTypes<Parser> {
   typedef ParserBase<Parser> Base;
   typedef Parser Impl;
 
-  typedef Variable GeneratorVariable;
+  typedef v8::internal::Variable Variable;
 
   // Return types for traversing functions.
   typedef const AstRawString* Identifier;
   typedef v8::internal::Expression* Expression;
   typedef v8::internal::FunctionLiteral* FunctionLiteral;
   typedef ObjectLiteral::Property* ObjectLiteralProperty;
   typedef ClassLiteral::Property* ClassLiteralProperty;
   typedef ZoneList<v8::internal::Expression*>* ExpressionList;
   typedef ZoneList<ObjectLiteral::Property*>* PropertyList;
   typedef ParserFormalParameters FormalParameters;
@@ skipping 419 matching lines @@
   V8_INLINE void QueueDestructuringAssignmentForRewriting(
       Expression* assignment);
   V8_INLINE void QueueNonPatternForRewriting(Expression* expr, bool* ok);
 
   friend class InitializerRewriter;
   void RewriteParameterInitializer(Expression* expr, Scope* scope);
 
   Expression* BuildCreateJSGeneratorObject(int pos, FunctionKind kind);
   Expression* BuildResolvePromise(Expression* value, int pos);
   Expression* BuildRejectPromise(Expression* value, int pos);
-  VariableProxy* BuildDotPromise();
-  VariableProxy* BuildDotDebugIsActive();
+  Variable* PromiseVariable();
 
   // Generic AST generator for throwing errors from compiled code.
   Expression* NewThrowError(Runtime::FunctionId function_id,
                             MessageTemplate::Template message,
                             const AstRawString* arg, int pos);
 
   void FinalizeIteratorUse(Variable* completion, Expression* condition,
                            Variable* iter, Block* iterator_use, Block* result);
 
   Statement* FinalizeForOfStatement(ForOfStatement* loop, Variable* completion,
@@ skipping 483 matching lines @@
   int total_preparse_skipped_;
   HistogramTimer* pre_parse_timer_;
 
   bool parsing_on_main_thread_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_H_