Remove duplicate way of encoding the holder in the flags.

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4792 matching lines @@
   enum StubType {
     NORMAL,
     FIELD,
     CONSTANT,
     CALLBACKS,
     INTERCEPTOR,
     TRANSITION,
     NONEXISTENT
   };
 
-  enum StubHolder {
-    OWN_STUB,
-    PROTOTYPE_STUB
-  };
-
   typedef int ExtraICState;
 
   static const ExtraICState kNoExtraICState = 0;
 
 #ifdef ENABLE_DISASSEMBLER
   // Printing
   static const char* ICState2String(InlineCacheState state);
   static const char* StubType2String(StubType type);
   static void PrintExtraICState(FILE* out, Kind kind, ExtraICState extra);
   void Disassemble(const char* name, FILE* out = stdout);
@@ skipping 184 matching lines @@
 
   // Find the first name in an IC stub.
   Name* FindFirstName();
 
   void ReplaceNthCell(int n, Cell* replace_with);
 
   class ExtraICStateStrictMode: public BitField<StrictModeFlag, 0, 1> {};
   class ExtraICStateKeyedAccessStoreMode:
       public BitField<KeyedAccessStoreMode, 1, 4> {};  // NOLINT
 
-  class ExtraICStateStubHolder: public BitField<StubHolder, 0, 1> {};
-
   static inline StrictModeFlag GetStrictMode(ExtraICState extra_ic_state) {
     return ExtraICStateStrictMode::decode(extra_ic_state);
   }
 
   static inline KeyedAccessStoreMode GetKeyedAccessStoreMode(
       ExtraICState extra_ic_state) {
     return ExtraICStateKeyedAccessStoreMode::decode(extra_ic_state);
   }
 
   static inline ExtraICState ComputeExtraICState(
       KeyedAccessStoreMode store_mode,
       StrictModeFlag strict_mode) {
     return ExtraICStateKeyedAccessStoreMode::encode(store_mode) |
         ExtraICStateStrictMode::encode(strict_mode);
   }
 
-  static inline ExtraICState ComputeExtraICState(StubHolder stub_holder) {
-    return ExtraICStateStubHolder::encode(stub_holder);
-  }
-
   // Flags operations.
   static inline Flags ComputeFlags(
       Kind kind,
       InlineCacheState ic_state = UNINITIALIZED,
       ExtraICState extra_ic_state = kNoExtraICState,
       StubType type = NORMAL,
       int argc = -1,
       InlineCacheHolderFlag holder = OWN_MAP);
 
   static inline Flags ComputeMonomorphicFlags(
@@ skipping 5189 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_