[ic] Encode [Keyed]StoreIC's language mode in slot kind instead of code object's flags.

src/type-feedback-vector-inl.h

Index: src/type-feedback-vector-inl.h
diff --git a/src/type-feedback-vector-inl.h b/src/type-feedback-vector-inl.h
index 31f78210020b4512bedb73e14d997ada157810b0..43f055b7bd6f8af19a4b67e6fc9bc1eabb856b62 100644
--- a/src/type-feedback-vector-inl.h
+++ b/src/type-feedback-vector-inl.h
@@ -63,8 +63,10 @@ int TypeFeedbackMetadata::GetSlotSize(FeedbackVectorSlotKind kind) {
     case FeedbackVectorSlotKind::LOAD_IC:
     case FeedbackVectorSlotKind::LOAD_GLOBAL_IC:
     case FeedbackVectorSlotKind::KEYED_LOAD_IC:
-    case FeedbackVectorSlotKind::STORE_IC:
-    case FeedbackVectorSlotKind::KEYED_STORE_IC:
+    case FeedbackVectorSlotKind::STORE_SLOPPY_IC:
+    case FeedbackVectorSlotKind::STORE_STRICT_IC:
+    case FeedbackVectorSlotKind::KEYED_STORE_SLOPPY_IC:
+    case FeedbackVectorSlotKind::KEYED_STORE_STRICT_IC:
     case FeedbackVectorSlotKind::STORE_DATA_PROPERTY_IN_LITERAL_IC:
       return 2;
 
@@ -174,8 +176,10 @@ void TypeFeedbackVector::ComputeCounts(int* with_type_info, int* generic,
       case FeedbackVectorSlotKind::LOAD_IC:
       case FeedbackVectorSlotKind::LOAD_GLOBAL_IC:
       case FeedbackVectorSlotKind::KEYED_LOAD_IC:
-      case FeedbackVectorSlotKind::STORE_IC:
-      case FeedbackVectorSlotKind::KEYED_STORE_IC:
+      case FeedbackVectorSlotKind::STORE_SLOPPY_IC:
+      case FeedbackVectorSlotKind::STORE_STRICT_IC:
+      case FeedbackVectorSlotKind::KEYED_STORE_SLOPPY_IC:
+      case FeedbackVectorSlotKind::KEYED_STORE_STRICT_IC:
       case FeedbackVectorSlotKind::STORE_DATA_PROPERTY_IN_LITERAL_IC: {
         if (obj->IsWeakCell() || obj->IsFixedArray() || obj->IsString()) {
           with++;