Install a generic handler whenever we fail to update the IC.

src/ic.h

Index: src/ic.h
diff --git a/src/ic.h b/src/ic.h
index fc869ad865fa9601e1a2555c57cc574ca83f1be5..e6e88176c876536dda258c0a4e624f007688f183 100644
--- a/src/ic.h
+++ b/src/ic.h
@@ -511,8 +511,8 @@ class StoreIC: public IC {
   static void GenerateMegamorphic(MacroAssembler* masm,
                                   StrictModeFlag strict_mode);
   static void GenerateNormal(MacroAssembler* masm);
-  static void GenerateGlobalProxy(MacroAssembler* masm,
-                                  StrictModeFlag strict_mode);
+  static void GenerateRuntimeSetProperty(MacroAssembler* masm,
+                                         StrictModeFlag strict_mode);
 
   MUST_USE_RESULT MaybeObject* Store(
       State state,
@@ -532,6 +532,12 @@ class StoreIC: public IC {
   virtual Handle<Code> megamorphic_stub_strict() {
     return isolate()->builtins()->StoreIC_Megamorphic_Strict();
   }
+  virtual Handle<Code> generic_stub() const {
+    return isolate()->builtins()->StoreIC_Generic();
+  }
+  virtual Handle<Code> generic_stub_strict() const {
+    return isolate()->builtins()->StoreIC_Generic_Strict();
+  }
   virtual Handle<Code> global_proxy_stub() {
     return isolate()->builtins()->StoreIC_GlobalProxy();
   }