[assembler] Introduce proper AssemblerBase::Print() for improved debuggability.

src/x64/assembler-x64.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 1596 matching lines @@
     bmi2l(kF2, 0xf7, dst, src2, src1);
   }
   void shrxl(Register dst, const Operand& src1, Register src2) {
     bmi2l(kF2, 0xf7, dst, src2, src1);
   }
   void rorxq(Register dst, Register src, byte imm8);
   void rorxq(Register dst, const Operand& src, byte imm8);
   void rorxl(Register dst, Register src, byte imm8);
   void rorxl(Register dst, const Operand& src, byte imm8);
 
-  // Debugging
-  void Print();
-
   // Check the code size generated from label to here.
   int SizeOfCodeGeneratedSince(Label* label) {
     return pc_offset() - label->pos();
   }
 
   // Mark generator continuation.
   void RecordGeneratorContinuation();
 
   // Mark address of a debug break slot.
   void RecordDebugBreakSlot(RelocInfo::Mode mode, int argc = 0);
@@ skipping 533 matching lines @@
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_X64_ASSEMBLER_X64_H_