WIP: Parser: delay string internalization.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index 8956e3c56b50f31af04c57a3caf9669d4c58f3f2..01a2cf94c01a076396d93b187c0317e1b122d553 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -277,15 +277,11 @@ namespace internal {
   V(constructor_string, "constructor")                                   \
   V(dot_result_string, ".result")                                        \
   V(dot_for_string, ".for.")                                             \
-  V(dot_iterator_string, ".iterator")                                    \
-  V(dot_generator_object_string, ".generator_object")                    \
   V(eval_string, "eval")                                                 \
   V(empty_string, "")                                                    \
   V(function_string, "function")                                         \
   V(length_string, "length")                                             \
-  V(module_string, "module")                                             \
   V(name_string, "name")                                                 \
-  V(native_string, "native")                                             \
   V(null_string, "null")                                                 \
   V(number_string, "number")                                             \
   V(Number_string, "Number")                                             \
@@ -311,7 +307,6 @@ namespace internal {
   V(private_api_string, "private_api")                                   \
   V(private_intern_string, "private_intern")                             \
   V(Date_string, "Date")                                                 \
-  V(this_string, "this")                                                 \
   V(to_string_string, "toString")                                        \
   V(char_at_string, "CharAt")                                            \
   V(undefined_string, "undefined")                                       \
@@ -334,19 +329,13 @@ namespace internal {
   V(cell_value_string, "%cell_value")                                    \
   V(function_class_string, "Function")                                   \
   V(illegal_argument_string, "illegal argument")                         \
-  V(MakeReferenceError_string, "MakeReferenceError")                     \
-  V(MakeSyntaxError_string, "MakeSyntaxError")                           \
-  V(MakeTypeError_string, "MakeTypeError")                               \
-  V(unknown_label_string, "unknown_label")                               \
   V(space_string, " ")                                                   \
   V(exec_string, "exec")                                                 \
   V(zero_string, "0")                                                    \
   V(global_eval_string, "GlobalEval")                                    \
   V(identity_hash_string, "v8::IdentityHash")                            \
   V(closure_string, "(closure)")                                         \
-  V(use_strict_string, "use strict")                                     \
   V(dot_string, ".")                                                     \
-  V(anonymous_function_string, "(anonymous function)")                   \
   V(compare_ic_string, "==")                                             \
   V(strict_compare_ic_string, "===")                                     \
   V(infinity_string, "Infinity")                                         \