Proof of concept: API for doing only one parsing pass instead of first preparsing and then parsing.

src/preparser.h

Index: src/preparser.h
diff --git a/src/preparser.h b/src/preparser.h
index 59a9a6108aca239f12537e032eaa14cf4b5a3a74..ba7844ff715c7b6b0ac14a97ab45c2fe091d9792 100644
--- a/src/preparser.h
+++ b/src/preparser.h
@@ -44,6 +44,7 @@ class ParserBase : public Traits {
  public:
   ParserBase(Scanner* scanner, uintptr_t stack_limit,
              v8::Extension* extension,
+             ParserRecorder* log,
              typename Traits::Type::Zone* zone,
              typename Traits::Type::Parser this_object)
       : Traits(this_object),
@@ -52,6 +53,7 @@ class ParserBase : public Traits {
         function_state_(NULL),
         extension_(extension),
         fni_(NULL),
+        log_(log),
         scanner_(scanner),
         stack_limit_(stack_limit),
         stack_overflow_(false),
@@ -408,6 +410,7 @@ class ParserBase : public Traits {
   FunctionState* function_state_;  // Function state stack.
   v8::Extension* extension_;
   FuncNameInferrer* fni_;
+  ParserRecorder* log_;
 
  private:
   Scanner* scanner_;
@@ -810,11 +813,9 @@ class PreParser : public ParserBase<PreParserTraits> {
     kPreParseSuccess
   };
 
-  PreParser(Scanner* scanner,
-            ParserRecorder* log,
-            uintptr_t stack_limit)
-      : ParserBase<PreParserTraits>(scanner, stack_limit, NULL, NULL, this),
-        log_(log) {}
+  PreParser(Scanner* scanner, ParserRecorder* log, uintptr_t stack_limit)
+      : ParserBase<PreParserTraits>(scanner, stack_limit, NULL, log, NULL,
+                                    this) {}
 
   // Pre-parse the program from the character stream; returns true on
   // success (even if parsing failed, the pre-parse data successfully
@@ -977,8 +978,6 @@ class PreParser : public ParserBase<PreParserTraits> {
   Expression GetStringSymbol();
 
   bool CheckInOrOf(bool accept_OF);
-
-  ParserRecorder* log_;
 };