VectorICs: vector [keyed]store ic MISS handling infrastructure.

src/ic/ic.cc

Index: src/ic/ic.cc
diff --git a/src/ic/ic.cc b/src/ic/ic.cc
index 9aa57739b506ca3c84754d267b0341f090fe1f7a..99307f700d9f94cb92ac0dc9f2f13331ae9f010a 100644
--- a/src/ic/ic.cc
+++ b/src/ic/ic.cc
@@ -2478,10 +2478,6 @@ RUNTIME_FUNCTION(Runtime_StoreIC_MissFromStubFailure) {
   Handle<Object> value = args.at<Object>(2);
   Handle<Object> result;
 
-  // Bailouts from transitioning stores may have the map to transition to as an
-  // extra argument.
-  DCHECK(args.length() < 4 || args.at<Object>(3)->IsMap());
-
   if (FLAG_vector_stores) {
     DCHECK(args.length() == 5 || args.length() == 6);
     Handle<Smi> slot = args.at<Smi>(3);