Turn RegExpConstructResultStub into a HydrogenCodeStub.

src/code-stubs.cc

Index: src/code-stubs.cc
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
index 5a2d2f4a7e224b3d8afa78f2290c5b833d95da0f..eb51e784ebbecf366a18f780bcee02c7ef0d268b 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -781,6 +781,13 @@ void StringAddStub::InstallDescriptors(Isolate* isolate) {
 }
 
 
+// static
+void RegExpConstructResultStub::InstallDescriptors(Isolate* isolate) {
+  RegExpConstructResultStub stub;
+  InstallDescriptor(isolate, &stub);
+}
+
+
 ArrayConstructorStub::ArrayConstructorStub(Isolate* isolate)
     : argument_count_(ANY) {
   ArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate);