Support load function prototype in hydrogen/lithium.

src/ast.h

Index: src/ast.h
diff --git a/src/ast.h b/src/ast.h
index ed447e343af26c4e5a91dcc5cf91237d9a70c6fb..da038f383a64c940b12a38808fa78f02b5519aad 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -1208,6 +1208,7 @@ class Property: public Expression {
         is_monomorphic_(false),
         receiver_types_(NULL),
         is_array_length_(false),
+        is_function_prototype_(false),
         is_arguments_access_(false) { }
 
   DECLARE_NODE_TYPE(Property)
@@ -1220,6 +1221,8 @@ class Property: public Expression {
   int position() const { return pos_; }
   bool is_synthetic() const { return type_ == SYNTHETIC; }
 
+  bool IsFunctionPrototype() const { return is_function_prototype_; }
+
   // Marks that this is actually an argument rewritten to a keyed property
   // accessing the argument through the arguments shadow object.
   void set_is_arguments_access(bool is_arguments_access) {
@@ -1249,6 +1252,7 @@ class Property: public Expression {
   bool is_monomorphic_;
   ZoneMapList* receiver_types_;
   bool is_array_length_;
+  bool is_function_prototype_;
   bool is_arguments_access_;
   Handle<Map> monomorphic_receiver_type_;