Introduce FeedbackNexus for vector-based ics.

src/ic/ic-state.h

Index: src/ic/ic-state.h
diff --git a/src/ic/ic-state.h b/src/ic/ic-state.h
index a8cfefd10453466405cd8d72940d337f18bc7aa2..5a0172ad258f91d8ff58d6f479cd65e58145344b 100644
--- a/src/ic/ic-state.h
+++ b/src/ic/ic-state.h
@@ -21,7 +21,7 @@ class ICUtility : public AllStatic {
                     ConstantPoolArray* constant_pool);
   // Clear a vector-based inline cache to initial state.
   static void Clear(Isolate* isolate, Code::Kind kind, Code* host,
-                    TypeFeedbackVector* vector, FeedbackVectorICSlot slot);
+                    FeedbackNexus* nexus);
 };