Backport the changes from the readability.

src/disasm.h

 // Copyright 2007-2008 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 31 matching lines @@
   virtual const char* NameOfXMMRegister(int reg) const;
   virtual const char* NameOfAddress(byte* addr) const;
   virtual const char* NameOfConstant(byte* addr) const;
   virtual const char* NameInCode(byte* addr) const;
 };
 
 
 // A generic Disassembler interface
 class Disassembler {
  public:
-  // Uses default NameConverter.
-  Disassembler();
-
   // Caller deallocates converter.
   explicit Disassembler(const NameConverter& converter);
 
   virtual ~Disassembler();
 
   // Writes one disassembled instruction into 'buffer' (0-terminated).
   // Returns the length of the disassembled machine instruction in bytes.
   int InstructionDecode(v8::internal::Vector<char> buffer, byte* instruction);
 
   // Returns -1 if instruction does not mark the beginning of a constant pool,
   // or the number of entries in the constant pool beginning here.
   int ConstantPoolSizeAt(byte* instruction);
 
   // Write disassembly into specified file 'f' using specified NameConverter
   // (see constructor).
   static void Disassemble(FILE* f, byte* begin, byte* end);
  private:
   const NameConverter& converter_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(Disassembler);
 };
 
 }  // namespace disasm
 
 #endif  // V8_DISASM_H_