[turbofan] Use context specialization in code stubs

src/code-stubs.cc

Index: src/code-stubs.cc
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
index efff187251f51be765edecdf5868f053e16ac8dd..5b936562798fd26d184803dd26e1caa0507196bc 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -500,6 +500,7 @@ Handle<Code> TurboFanCodeStub::GenerateCode() {
   ParseInfo parse_info(&zone, inner);
   CompilationInfo info(&parse_info);
   info.SetFunctionType(GetCallInterfaceDescriptor().GetFunctionType());
+  info.MarkAsContextSpecializing();
   info.SetStub(this);
   return info.GenerateCodeStub();
 }