Two-threaded parser

src/preparser.h

Index: src/preparser.h
diff --git a/src/preparser.h b/src/preparser.h
index 9dee863d591191a40de0a78d7d191347f9bc3966..060ab488636c93514b48cdc969ffa71f8a519dea 100644
--- a/src/preparser.h
+++ b/src/preparser.h
@@ -15,6 +15,8 @@
 namespace v8 {
 namespace internal {
 
+class FastParserThread;
+
 // Common base class shared between parser and pre-parser. Traits encapsulate
 // the differences between Parser and PreParser:
 
@@ -64,6 +66,7 @@ class ParserBase : public Traits {
 
   ParserBase(Scanner* scanner, uintptr_t stack_limit,
              v8::Extension* extension,
+             FastParserThread* thread,
              ParserRecorder* log,
              typename Traits::Type::Zone* zone,
              typename Traits::Type::Parser this_object)
@@ -75,6 +78,7 @@ class ParserBase : public Traits {
         fni_(NULL),
         log_(log),
         mode_(PARSE_EAGERLY),  // Lazy mode must be set explicitly.
+        thread_(thread),
         scanner_(scanner),
         stack_limit_(stack_limit),
         stack_overflow_(false),
@@ -474,6 +478,7 @@ class ParserBase : public Traits {
   FuncNameInferrer* fni_;
   ParserRecorder* log_;
   Mode mode_;
+  FastParserThread* thread_;
 
  private:
   Scanner* scanner_;
@@ -1074,9 +1079,10 @@ class PreParser : public ParserBase<PreParserTraits> {
     kPreParseSuccess
   };
 
-  PreParser(Scanner* scanner, ParserRecorder* log, uintptr_t stack_limit)
-      : ParserBase<PreParserTraits>(scanner, stack_limit, NULL, log, NULL,
-                                    this) {}
+  PreParser(Scanner* scanner, ParserRecorder* log, uintptr_t stack_limit,
+            FastParserThread* thread)
+      : ParserBase<PreParserTraits>(scanner, stack_limit, NULL, thread, log,
+                                    NULL, this) {}
 
   // Pre-parse the program from the character stream; returns true on
   // success (even if parsing failed, the pre-parse data successfully