[runtime] Rewrite Function.prototype.toString in C++.

src/runtime/runtime-function.cc

Index: src/runtime/runtime-function.cc
diff --git a/src/runtime/runtime-function.cc b/src/runtime/runtime-function.cc
index e1e9c46e0bd3315ea7cab87ef11223d0367ef26f..d6c079ae6b63be37e5615e9debd3eef9d56bde45 100644
--- a/src/runtime/runtime-function.cc
+++ b/src/runtime/runtime-function.cc
@@ -38,15 +38,6 @@ RUNTIME_FUNCTION(Runtime_FunctionSetName) {
 }
 
 
-RUNTIME_FUNCTION(Runtime_FunctionNameShouldPrintAsAnonymous) {
-  SealHandleScope shs(isolate);
-  DCHECK(args.length() == 1);
-  CONVERT_ARG_CHECKED(JSFunction, f, 0);
-  return isolate->heap()->ToBoolean(
-      f->shared()->name_should_print_as_anonymous());
-}
-
-
 RUNTIME_FUNCTION(Runtime_CompleteFunctionConstruction) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 3);
@@ -89,22 +80,6 @@ RUNTIME_FUNCTION(Runtime_CompleteFunctionConstruction) {
 }
 
 
-RUNTIME_FUNCTION(Runtime_FunctionIsArrow) {
-  SealHandleScope shs(isolate);
-  DCHECK(args.length() == 1);
-  CONVERT_ARG_CHECKED(JSFunction, f, 0);
-  return isolate->heap()->ToBoolean(f->shared()->is_arrow());
-}
-
-
-RUNTIME_FUNCTION(Runtime_FunctionIsConciseMethod) {
-  SealHandleScope shs(isolate);
-  DCHECK(args.length() == 1);
-  CONVERT_ARG_CHECKED(JSFunction, f, 0);
-  return isolate->heap()->ToBoolean(f->shared()->is_concise_method());
-}
-
-
 RUNTIME_FUNCTION(Runtime_FunctionRemovePrototype) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 1);
@@ -210,18 +185,6 @@ RUNTIME_FUNCTION(Runtime_FunctionIsAPIFunction) {
 }
 
 
-RUNTIME_FUNCTION(Runtime_FunctionHidesSource) {
-  SealHandleScope shs(isolate);
-  DCHECK(args.length() == 1);
-  CONVERT_ARG_CHECKED(JSFunction, f, 0);
-
-  SharedFunctionInfo* shared = f->shared();
-  bool hide_source = !shared->script()->IsScript() ||
-                     Script::cast(shared->script())->hide_source();
-  return isolate->heap()->ToBoolean(hide_source);
-}
-
-
 RUNTIME_FUNCTION(Runtime_SetCode) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 2);
@@ -619,5 +582,13 @@ RUNTIME_FUNCTION(Runtime_ThrowStrongModeTooFewArguments) {
                                  NewTypeError(MessageTemplate::kStrongArity));
 }
 
+
+RUNTIME_FUNCTION(Runtime_FunctionToString) {
+  HandleScope scope(isolate);
+  DCHECK_EQ(1, args.length());
+  CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
+  return *JSFunction::ToString(function);
+}
+
 }  // namespace internal
 }  // namespace v8