Implement new Function.prototype.toString and fix CreateDynamicFunction parsing

src/parsing/parse-info.h

Index: src/parsing/parse-info.h
diff --git a/src/parsing/parse-info.h b/src/parsing/parse-info.h
index 24188d95e2c154f99a0610cc4dd239dd05d554ed..b60708949c41b0f7b436198a0527fb9dd949cd10 100644
--- a/src/parsing/parse-info.h
+++ b/src/parsing/parse-info.h
@@ -147,6 +147,11 @@ class V8_EXPORT_PRIVATE ParseInfo {
   int end_position() const { return end_position_; }
   void set_end_position(int end_position) { end_position_ = end_position; }
 
+  int parameters_end_pos() const { return parameters_end_pos_; }
+  void set_parameters_end_pos(int parameters_end_pos) {
+    parameters_end_pos_ = parameters_end_pos;
+  }
+
   // Getters for individual compiler hints.
   bool is_declaration() const;
   bool requires_class_field_init() const;
@@ -227,6 +232,7 @@ class V8_EXPORT_PRIVATE ParseInfo {
   int compiler_hints_;
   int start_position_;
   int end_position_;
+  int parameters_end_pos_;
 
   // TODO(titzer): Move handles and isolate out of ParseInfo.
   Isolate* isolate_;