VectorICs: refactoring to eliminate "for queries only" vector ic mode.

src/type-feedback-vector.cc

Index: src/type-feedback-vector.cc
diff --git a/src/type-feedback-vector.cc b/src/type-feedback-vector.cc
index adf0a5078af05c056bc1e765bd87f25a008f3357..999eaab231d3d3d2db802c34fac906c87b941d2e 100644
--- a/src/type-feedback-vector.cc
+++ b/src/type-feedback-vector.cc
@@ -24,10 +24,8 @@ TypeFeedbackVector::VectorICKind TypeFeedbackVector::FromCodeKind(
     case Code::KEYED_LOAD_IC:
       return KindKeyedLoadIC;
     case Code::STORE_IC:
-      DCHECK(FLAG_vector_stores);
       return KindStoreIC;
     case Code::KEYED_STORE_IC:
-      DCHECK(FLAG_vector_stores);
       return KindKeyedStoreIC;
     default:
       // Shouldn't get here.
@@ -225,6 +223,12 @@ void TypeFeedbackVector::ClearICSlotsImpl(SharedFunctionInfo* shared,
 }
 
 
+// static
+Handle<TypeFeedbackVector> TypeFeedbackVector::DummyVector(Isolate* isolate) {
+  return Handle<TypeFeedbackVector>::cast(isolate->factory()->dummy_vector());
+}
+
+
 Handle<FixedArray> FeedbackNexus::EnsureArrayOfSize(int length) {
   Isolate* isolate = GetIsolate();
   Handle<Object> feedback = handle(GetFeedback(), isolate);