Revert of [compiler] Drop the CompareNilIC.

src/ic/ic-compiler.h

Index: src/ic/ic-compiler.h
diff --git a/src/ic/ic-compiler.h b/src/ic/ic-compiler.h
index 3a5aecccbb3d59659243d1bb0118e74eab9a15b2..08444df65416ed6e1ff218b2deef5292db8f723a 100644
--- a/src/ic/ic-compiler.h
+++ b/src/ic/ic-compiler.h
@@ -32,6 +32,10 @@
       MapHandleList* receiver_maps, MapHandleList* transitioned_maps,
       CodeHandleList* handlers, KeyedAccessStoreMode store_mode,
       LanguageMode language_mode);
+
+  // Compare nil
+  static Handle<Code> ComputeCompareNil(Handle<Map> receiver_map,
+                                        CompareNilICStub* stub);
 
   // Helpers
   // TODO(verwaest): Move all uses of these helpers to the PropertyICCompiler