Remove dead code from LookupResult

src/hydrogen.h

 // Copyright 2012 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_HYDROGEN_H_
 #define V8_HYDROGEN_H_
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 2494 matching lines @@
 
     bool IsFound() const { return lookup_.IsFound(); }
     bool IsProperty() const { return lookup_.IsProperty(); }
     bool IsField() const { return lookup_.IsField(); }
     bool IsConstant() const { return lookup_.IsConstant(); }
     bool IsAccessor() const { return lookup_.IsPropertyCallbacks(); }
     bool IsTransition() const { return lookup_.IsTransition(); }
 
     bool IsConfigurable() const { return lookup_.IsConfigurable(); }
     bool IsReadOnly() const { return lookup_.IsReadOnly(); }
-    bool IsCacheable() const { return lookup_.IsCacheable(); }
 
    private:
     Handle<Object> GetAccessorsFromMap(Handle<Map> map) const {
       return handle(lookup_.GetValueFromMap(*map), isolate());
     }
     Handle<Object> GetConstantFromMap(Handle<Map> map) const {
       return handle(lookup_.GetConstantFromMap(*map), isolate());
     }
     Handle<HeapType> GetFieldTypeFromMap(Handle<Map> map) const {
       return handle(lookup_.GetFieldTypeFromMap(*map), isolate());
@@ skipping 403 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_