Don't add code dependencies eagerly for HCheckMaps.

src/lithium.h

Index: src/lithium.h
diff --git a/src/lithium.h b/src/lithium.h
index 050b3e5498dac0813c3a79a9e1848dea394e6ec1..edeef44e214cf8aad5da238b944c775aa1103ff6 100644
--- a/src/lithium.h
+++ b/src/lithium.h
@@ -652,6 +652,13 @@ class LChunk : public ZoneObject {
     deprecation_dependencies_.insert(map);
   }
 
+  void AddStabilityDependency(Handle<Map> map) {
+    ASSERT(map->is_stable());
+    if (!map->CanTransition()) return;
+    ASSERT(!info_->IsStub());
+    stability_dependencies_.insert(map);
+  }
+
   Zone* zone() const { return info_->zone(); }
 
   Handle<Code> Codegen();
@@ -680,6 +687,7 @@ class LChunk : public ZoneObject {
   ZoneList<LPointerMap*> pointer_maps_;
   ZoneList<Handle<JSFunction> > inlined_closures_;
   MapSet deprecation_dependencies_;
+  MapSet stability_dependencies_;
 };