Do not call memset() to initialize StubCache.

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index 128136faa0b83d47ba0ed90fa972cf04282e1d2f..93742bd7cde1e77e5ff83b13d836b72b7f645a6d 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -1836,13 +1836,12 @@ bool Isolate::Init(Deserializer* des) {
 #ifdef ENABLE_DEBUGGER_SUPPORT
   debug_->SetUp(create_heap_objects);
 #endif
-  stub_cache_->Initialize(create_heap_objects);
 
   // If we are deserializing, read the state into the now-empty heap.
   if (des != NULL) {
     des->Deserialize();
-    stub_cache_->Initialize(true);
   }
+  stub_cache_->Initialize();
 
   // Finish initialization of ThreadLocal after deserialization is done.
   clear_pending_exception();