Minor refactoring for Zone class and friends.

src/scopeinfo.h

 // Copyright 2011 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_SCOPEINFO_H_
 #define V8_SCOPEINFO_H_
 
 #include "src/allocation.h"
 #include "src/variables.h"
-#include "src/zone-inl.h"
 
 namespace v8 {
 namespace internal {
 
 // Cache for mapping (data, property name) into context slot index.
 // The cache contains both positive and negative results.
 // Slot index equals -1 means the property is absent.
 // Cleared at startup and prior to mark sweep collection.
 class ContextSlotCache {
  public:
@@ skipping 144 matching lines @@
   }
   void set_index(int i, int index) {
     set(index_offset(i), Smi::FromInt(index));
   }
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_SCOPEINFO_H_