Remove HandlerKindField and just encode the handlerkind as the only extra-ic-state.

src/code-stubs.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 864 matching lines @@
 
  protected:
   class KindBits: public BitField<Code::Kind, 0, 4> {};
   virtual Code::Kind kind() const = 0;
 };
 
 
 class HandlerStub: public HICStub {
  public:
   virtual Code::Kind GetCodeKind() const { return Code::HANDLER; }
-  virtual ExtraICState GetExtraICState() {
-    return Code::HandlerKindField::encode(kind());
-  }
+  virtual ExtraICState GetExtraICState() { return kind(); }
 
  protected:
   HandlerStub() : HICStub() { }
   virtual int NotMissMinorKey() { return bit_field_; }
   int bit_field_;
 };
 
 
 class LoadFieldStub: public HandlerStub {
  public:
@@ skipping 1573 matching lines @@
 
 
 class CallDescriptors {
  public:
   static void InitializeForIsolate(Isolate* isolate);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_