[counters] Implement off-isolate RuntimeCallStats for the Preparser

src/parsing/parser.h

Index: src/parsing/parser.h
diff --git a/src/parsing/parser.h b/src/parsing/parser.h
index 19384f6fdba3581cc78d0c55a68ed2c1d5a98966..8a5fa08fcf0c7992210416eeb33a5233e057f27f 100644
--- a/src/parsing/parser.h
+++ b/src/parsing/parser.h
@@ -203,6 +203,8 @@ class V8_EXPORT_PRIVATE Parser : public NON_EXPORTED_BASE(ParserBase<Parser>) {
     cached_parse_data_ = NULL;
   }
 
+  static bool const IsPreParser() { return false; }
+
   // Parses the source code represented by the compilation info and sets its
   // function literal.  Returns false (and deallocates any allocated AST
   // nodes) if parsing failed.
@@ -1150,7 +1152,6 @@ class V8_EXPORT_PRIVATE Parser : public NON_EXPORTED_BASE(ParserBase<Parser>) {
   // parsing.
   int use_counts_[v8::Isolate::kUseCounterFeatureCount];
   int total_preparse_skipped_;
-
   bool parsing_on_main_thread_;
   ParserLogger* log_;
 };