[regexp] Port RegExpCompile and RegExpToString

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 8ae2d3cc8ffe7ed98ac611f9f808c1b8db85a980..487cc3cd9f5ee2a6cdda1fd3e98b216367f11cf1 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1721,6 +1721,13 @@ void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
                           Builtins::kRegExpPrototypeStickyGetter, true);
       SimpleInstallGetter(prototype, factory->unicode_string(),
                           Builtins::kRegExpPrototypeUnicodeGetter, true);
+
+      SimpleInstallFunction(prototype, "compile",
+                            Builtins::kRegExpPrototypeCompile, 2, false,
+                            DONT_ENUM);
+      SimpleInstallFunction(prototype, factory->toString_string(),
+                            Builtins::kRegExpPrototypeToString, 0, false,
+                            DONT_ENUM);
     }
 
     {