[runtime] First step to sanitize regexp literal creation.

src/code-stubs.cc

Index: src/code-stubs.cc
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
index 50f51f147321d0ce8b6c23730f60604d4f624283..66aa7679575b440ea343cfb4322c74e421614464 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -694,6 +694,13 @@ void NumberToStringStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {
 }
 
 
+void FastCloneRegExpStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {
+  FastCloneRegExpDescriptor call_descriptor(isolate());
+  descriptor->Initialize(
+      Runtime::FunctionForId(Runtime::kCreateRegExpLiteral)->entry);
+}
+
+
 void FastCloneShallowArrayStub::InitializeDescriptor(
     CodeStubDescriptor* descriptor) {
   FastCloneShallowArrayDescriptor call_descriptor(isolate());