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

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index 19036e7739787108d49a4b3a6d215ab5aa17a0aa..5487abd00eee5a644ec32d2e632ef1203fc2aa2f 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -662,19 +662,19 @@ class Parser : public ParserBase<ParserTraits> {
                             info->isolate()->unicode_cache()};
     Parser parser(info, &parse_info);
     parser.set_allow_lazy(allow_lazy);
-    if (parser.Parse()) {
+    if (parser.ParseOnMainThread(info)) {
       info->SetLanguageMode(info->function()->language_mode());
       return true;
     }
     return false;
   }
-  bool Parse();
-  void ParseOnBackground();
+  bool ParseOnMainThread(CompilationInfo* info);
+  void ParseOnBackground(CompilationInfo* info);
 
   // Handle errors detected during parsing, move statistics to Isolate,
   // internalize strings (move them to the heap).
-  void Internalize();
-  void HandleSourceURLComments();
+  void Internalize(CompilationInfo* info);
+  void HandleSourceURLComments(CompilationInfo* info);
 
  private:
   friend class ParserTraits;
@@ -701,31 +701,28 @@ class Parser : public ParserBase<ParserTraits> {
   };
 
   // Returns NULL if parsing failed.
-  FunctionLiteral* ParseProgram();
+  FunctionLiteral* ParseProgram(CompilationInfo* info);
 
-  FunctionLiteral* ParseLazy();
-  FunctionLiteral* ParseLazy(Utf16CharacterStream* source);
-
-  Isolate* isolate() { return info_->isolate(); }
-  CompilationInfo* info() const { return info_; }
-  Handle<Script> script() const { return info_->script(); }
+  FunctionLiteral* ParseLazy(CompilationInfo* info);
+  FunctionLiteral* ParseLazy(CompilationInfo* info,
+                             Utf16CharacterStream* source);
 
   // Called by ParseProgram after setting up the scanner.
   FunctionLiteral* DoParseProgram(CompilationInfo* info, Scope** scope,
                                   Scope** ad_hoc_eval_scope);
 
-  void SetCachedData();
+  void SetCachedData(CompilationInfo* info);
 
   bool inside_with() const { return scope_->inside_with(); }
   ScriptCompiler::CompileOptions compile_options() const {
-    return info_->compile_options();
+    return compile_options_;
   }
   bool consume_cached_parse_data() const {
-    return compile_options() == ScriptCompiler::kConsumeParserCache &&
+    return compile_options_ == ScriptCompiler::kConsumeParserCache &&
            cached_parse_data_ != NULL;
   }
   bool produce_cached_parse_data() const {
-    return compile_options() == ScriptCompiler::kProduceParserCache;
+    return compile_options_ == ScriptCompiler::kProduceParserCache;
   }
   Scope* DeclarationScope(VariableMode mode) {
     return IsLexicalVariableMode(mode)
@@ -859,7 +856,7 @@ class Parser : public ParserBase<ParserTraits> {
       const AstRawString* function_name, int pos, Variable* fvar,
       Token::Value fvar_init_op, FunctionKind kind, bool* ok);
 
-  void ThrowPendingError();
+  void ThrowPendingError(Isolate* isolate, Handle<Script> script);
 
   TemplateLiteralState OpenTemplateLiteral(int pos);
   void AddTemplateSpan(TemplateLiteralState* state, bool tail);
@@ -873,9 +870,9 @@ class Parser : public ParserBase<ParserTraits> {
   PreParser* reusable_preparser_;
   Scope* original_scope_;  // for ES5 function declarations in sloppy eval
   Target* target_stack_;  // for break, continue statements
+  ScriptCompiler::CompileOptions compile_options_;
   ParseData* cached_parse_data_;
 
-  CompilationInfo* info_;
   bool parsing_lazy_arrow_parameters_;  // for lazily parsed arrow functions.
 
   // Pending errors.