[regexp] Port RegExpCompile and RegExpToString

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index de4441f24c18a71ec4af1c974b22656a7f88010e..e9673076ede0982589a59b98e5602a094c311740 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1636,6 +1636,12 @@ void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
                           Builtins::kRegExpPrototypeStickyGetter, false);
       SimpleInstallGetter(proto, factory->unicode_string(),
                           Builtins::kRegExpPrototypeUnicodeGetter, false);
+
+      SimpleInstallFunction(proto, "compile", Builtins::kRegExpPrototypeCompile,
+                            2, false, DONT_ENUM);
+      SimpleInstallFunction(proto, factory->toString_string(),
+                            Builtins::kRegExpPrototypeToString, 0, false,
+                            DONT_ENUM);
     }
 
     {