Use a simpler KeyedStoreGeneric stub

src/ic/ic.cc

Index: src/ic/ic.cc
diff --git a/src/ic/ic.cc b/src/ic/ic.cc
index 98d86b5e39f41e97b45bc301e92e5768ba4a2616..e934a89a446902d1f053f912fa61dcb12fd5813e 100644
--- a/src/ic/ic.cc
+++ b/src/ic/ic.cc
@@ -1672,11 +1672,10 @@ Handle<Code> KeyedStoreIC::StoreElementStub(Handle<JSObject> receiver,
     return generic_stub();
   }
 
-  // If the maximum number of receiver maps has been exceeded, use the generic
-  // version of the IC.
+  // If the maximum number of receiver maps has been exceeded, use the
+  // megamorphic version of the IC.
   if (target_receiver_maps.length() > kMaxKeyedPolymorphism) {
-    TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "max polymorph exceeded");
-    return generic_stub();
+    return megamorphic_stub();
   }
 
   // Make sure all polymorphic handlers have the same store mode, otherwise the
@@ -1941,6 +1940,13 @@ MaybeHandle<Object> KeyedStoreIC::Store(Handle<Object> object,
 
 
 // static
+void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
+                                   StrictMode strict_mode) {
+  PropertyICCompiler::GenerateRuntimeSetProperty(masm, strict_mode);
+}
+
+
+// static
 void CallIC::OnTypeFeedbackChanged(Isolate* isolate, Code* host,
                                    TypeFeedbackVector* vector, State old_state,
                                    State new_state) {