[builtins] Move builtins into own files

src/builtins/builtins.h

Index: src/builtins/builtins.h
diff --git a/src/builtins/builtins.h b/src/builtins/builtins.h
index 929446de1b47b833a8817ef141c70ba0ce23cd4e..f41f07ec35c0a144f207e0de81c21574577d075b 100644
--- a/src/builtins/builtins.h
+++ b/src/builtins/builtins.h
@@ -402,6 +402,7 @@ namespace internal {
   CPP(NumberPrototypeToString)                                               \
   /* ES6 section 20.1.3.7 Number.prototype.valueOf ( ) */                    \
   TFJ(NumberPrototypeValueOf, 1)                                             \
+                                                                             \
   /* Object */                                                               \
   CPP(ObjectAssign)                                                          \
   CPP(ObjectCreate)                                                          \
@@ -576,6 +577,10 @@ class Builtins {
   static void Generate_Adaptor(MacroAssembler* masm, Address builtin_address,
                                ExitFrameType exit_frame_type);
 
+  static MaybeHandle<JSFunction> CompileString(Handle<Context> context,
+                                               Handle<String> source,
+                                               ParseRestriction restriction);
+
  private:
   Builtins();