VectorICs: recreate feedback vector if scoping changes on recompile.

src/type-feedback-vector.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_TYPE_FEEDBACK_VECTOR_H_
 #define V8_TYPE_FEEDBACK_VECTOR_H_
 
 #include <vector>
 
 #include "src/checks.h"
@@ skipping 116 matching lines @@
   void change_ic_generic_count(int delta) {
     if (delta == 0) return;
     int value = ic_generic_count() + delta;
     if (value >= 0) {
       set(kGenericCountIndex, Smi::FromInt(value));
     }
   }
 
   inline int ic_metadata_length() const;
 
+  bool SpecDiffersFrom(const ZoneFeedbackVectorSpec* other_spec) const;
+
   int Slots() const {
     if (length() == 0) return 0;
     return Max(
         0, first_ic_slot_index() - ic_metadata_length() - kReservedIndexCount);
   }
 
   int ICSlots() const {
     if (length() == 0) return 0;
     return (length() - first_ic_slot_index()) / elements_per_ic_slot();
   }
@@ skipping 269 matching lines @@
   void ConfigurePolymorphic(Handle<Name> name, MapHandleList* maps,
                             CodeHandleList* handlers);
 
   InlineCacheState StateFromFeedback() const OVERRIDE;
   Name* FindFirstName() const OVERRIDE;
 };
 }
 }  // namespace v8::internal
 
 #endif  // V8_TRANSITIONS_H_