Parsing: Make Parser not know about Isolate during background parsing.

src/preparser.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_PREPARSER_H
 #define V8_PREPARSER_H
 
 #include "src/v8.h"
 
 #include "src/bailout-reason.h"
@@ skipping 49 matching lines @@
 template <typename Traits>
 class ParserBase : public Traits {
  public:
   // Shorten type names defined by Traits.
   typedef typename Traits::Type::Expression ExpressionT;
   typedef typename Traits::Type::Identifier IdentifierT;
   typedef typename Traits::Type::FunctionLiteral FunctionLiteralT;
   typedef typename Traits::Type::Literal LiteralT;
   typedef typename Traits::Type::ObjectLiteralProperty ObjectLiteralPropertyT;
 
-  ParserBase(Isolate* isolate, Zone* zone, Scanner* scanner,
-             uintptr_t stack_limit, v8::Extension* extension,
-             AstValueFactory* ast_value_factory, ParserRecorder* log,
-             typename Traits::Type::Parser this_object)
+  ParserBase(Zone* zone, Scanner* scanner, uintptr_t stack_limit,
+             v8::Extension* extension, AstValueFactory* ast_value_factory,
+             ParserRecorder* log, typename Traits::Type::Parser this_object)
       : Traits(this_object),
         parenthesized_function_(false),
         scope_(NULL),
         function_state_(NULL),
         extension_(extension),
         fni_(NULL),
         ast_value_factory_(ast_value_factory),
         log_(log),
         mode_(PARSE_EAGERLY),  // Lazy mode must be set explicitly.
         stack_limit_(stack_limit),
-        isolate_(isolate),
         zone_(zone),
         scanner_(scanner),
         stack_overflow_(false),
         allow_lazy_(false),
         allow_natives_(false),
         allow_harmony_arrow_functions_(false),
         allow_harmony_object_literals_(false),
         allow_harmony_sloppy_(false),
         allow_harmony_computed_property_names_(false),
         allow_harmony_rest_params_(false),
@@ skipping 216 matching lines @@
     DCHECK((scope_type == FUNCTION_SCOPE && IsValidFunctionKind(kind)) ||
            kind == kNormalFunction);
     Scope* result =
         new (zone()) Scope(zone(), parent, scope_type, ast_value_factory());
     bool uninitialized_this =
         FLAG_experimental_classes && IsSubclassConstructor(kind);
     result->Initialize(uninitialized_this);
     return result;
   }
 
-  Isolate* isolate() const { return isolate_; }
   Scanner* scanner() const { return scanner_; }
   AstValueFactory* ast_value_factory() const { return ast_value_factory_; }
   int position() { return scanner_->location().beg_pos; }
   int peek_position() { return scanner_->peek_location().beg_pos; }
   bool stack_overflow() const { return stack_overflow_; }
   void set_stack_overflow() { stack_overflow_ = true; }
   Mode mode() const { return mode_; }
   Zone* zone() const { return zone_; }
 
   INLINE(Token::Value peek()) {
@@ skipping 313 matching lines @@
   Scope* scope_;                   // Scope stack.
   FunctionState* function_state_;  // Function state stack.
   v8::Extension* extension_;
   FuncNameInferrer* fni_;
   AstValueFactory* ast_value_factory_;  // Not owned.
   ParserRecorder* log_;
   Mode mode_;
   uintptr_t stack_limit_;
 
  private:
-  Isolate* isolate_;
   Zone* zone_;
 
   Scanner* scanner_;
   bool stack_overflow_;
 
   bool allow_lazy_;
   bool allow_natives_;
   bool allow_harmony_arrow_functions_;
   bool allow_harmony_object_literals_;
   bool allow_harmony_sloppy_;
@@ skipping 833 matching lines @@
  public:
   typedef PreParserIdentifier Identifier;
   typedef PreParserExpression Expression;
   typedef PreParserStatement Statement;
 
   enum PreParseResult {
     kPreParseStackOverflow,
     kPreParseSuccess
   };
 
-  PreParser(Isolate* isolate, Zone* zone, Scanner* scanner,
-            AstValueFactory* ast_value_factory, ParserRecorder* log,
-            uintptr_t stack_limit)
-      : ParserBase<PreParserTraits>(isolate, zone, scanner, stack_limit, NULL,
+  PreParser(Zone* zone, Scanner* scanner, AstValueFactory* ast_value_factory,
+            ParserRecorder* log, uintptr_t stack_limit)
+      : ParserBase<PreParserTraits>(zone, scanner, stack_limit, NULL,
                                     ast_value_factory, log, this) {}
 
   // Pre-parse the program from the character stream; returns true on
   // success (even if parsing failed, the pre-parse data successfully
   // captured the syntax error), and false if a stack-overflow happened
   // during parsing.
   PreParseResult PreParseProgram(int* materialized_literals = 0) {
     Scope* scope = NewScope(scope_, SCRIPT_SCOPE);
     PreParserFactory factory(NULL);
     FunctionState top_scope(&function_state_, &scope_, scope, kNormalFunction,
@@ skipping 1537 matching lines @@
       *ok = false;
       return;
     }
     has_seen_constructor_ = true;
     return;
   }
 }
 } }  // v8::internal
 
 #endif  // V8_PREPARSER_H