Vector ICs: Ensure KeyedAccessStore mode is encoded in all handlers.

src/ic/ic.h

Index: src/ic/ic.h
diff --git a/src/ic/ic.h b/src/ic/ic.h
index ee5fd261dc68c82be561010ce9770d82a25cea03..f8076cc1bb7752afc8d9e432a21ef6e08d14898a 100644
--- a/src/ic/ic.h
+++ b/src/ic/ic.h
@@ -525,9 +525,9 @@ class KeyedStoreIC : public StoreIC {
   // When more language modes are added, these BitFields need to move too.
   STATIC_ASSERT(i::LANGUAGE_END == 3);
   class ExtraICStateKeyedAccessStoreMode
-      : public BitField<KeyedAccessStoreMode, 3, 4> {};  // NOLINT
+      : public BitField<KeyedAccessStoreMode, 3, 3> {};  // NOLINT
 
-  class IcCheckTypeField : public BitField<IcCheckType, 7, 1> {};
+  class IcCheckTypeField : public BitField<IcCheckType, 6, 1> {};
 
   static ExtraICState ComputeExtraICState(LanguageMode flag,
                                           KeyedAccessStoreMode mode) {
@@ -599,6 +599,8 @@ class KeyedStoreIC : public StoreIC {
   Handle<Map> ComputeTransitionedMap(Handle<Map> map,
                                      KeyedAccessStoreMode store_mode);
 
+  void ValidateStoreMode(Handle<Code> stub);
+
   friend class IC;
 };