x64: Fix clang complain error of unused private field.

src/x64/stub-cache-x64.cc

 // 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 452 matching lines @@
   GenerateFastApiCallBody(masm,
                           optimization,
                           argc,
                           receiver,
                           true);
 }
 
 
 class CallInterceptorCompiler BASE_EMBEDDED {
  public:
-  CallInterceptorCompiler(CallStubCompiler* stub_compiler,
-                          const ParameterCount& arguments,
-                          Register name)
+  CallInterceptorCompiler(CallStubCompiler* stub_compiler, Register name)
       : stub_compiler_(stub_compiler),
-        arguments_(arguments),
         name_(name) {}
 
   void Compile(MacroAssembler* masm,
                Handle<JSObject> object,
                Handle<JSObject> holder,
                Handle<Name> name,
                LookupResult* lookup,
                Register receiver,
                Register scratch1,
                Register scratch2,
@@ skipping 114 matching lines @@
       __ pop(holder);
       __ pop(receiver);
       // Leave the internal frame.
     }
 
     __ CompareRoot(rax, Heap::kNoInterceptorResultSentinelRootIndex);
     __ j(not_equal, interceptor_succeeded);
   }
 
   CallStubCompiler* stub_compiler_;
-  const ParameterCount& arguments_;
   Register name_;
 };
 
 
 void StoreStubCompiler::GenerateRestoreName(MacroAssembler* masm,
                                             Label* label,
                                             Handle<Name> name) {
   if (!label->is_unused()) {
     __ bind(label);
     __ Move(this->name(), name);
@@ skipping 835 matching lines @@
   Label miss;
   GenerateNameCheck(name, &miss);
 
   LookupResult lookup(isolate());
   LookupPostInterceptor(holder, name, &lookup);
 
   // Get the receiver from the stack.
   StackArgumentsAccessor args(rsp, arguments());
   __ movp(rdx, args.GetReceiverOperand());
 
-  CallInterceptorCompiler compiler(this, arguments(), rcx);
+  CallInterceptorCompiler compiler(this, rcx);
   compiler.Compile(masm(), object, holder, name, &lookup, rdx, rbx, rdi, rax,
                    &miss);
 
   // Restore receiver.
   __ movp(rdx, args.GetReceiverOperand());
 
   GenerateJumpFunction(object, rax, &miss);
 
   HandlerFrontendFooter(&miss);
 
@@ skipping 379 matching lines @@
   // -----------------------------------
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64