| Index: src/x64/codegen-x64.cc | 
| diff --git a/src/x64/codegen-x64.cc b/src/x64/codegen-x64.cc | 
| index 5baf1a8e1bf4894d06991da097dd8f8e9035c3d0..4654f4027397ac78c25ebff5531a86d7786f1e1b 100644 | 
| --- a/src/x64/codegen-x64.cc | 
| +++ b/src/x64/codegen-x64.cc | 
| @@ -644,7 +644,8 @@ void MathExpGenerator::EmitMathExp(MacroAssembler* masm, | 
| #undef __ | 
|  | 
|  | 
| -CodeAgingHelper::CodeAgingHelper() { | 
| +CodeAgingHelper::CodeAgingHelper(Isolate* isolate) { | 
| +  USE(isolate); | 
| DCHECK(young_sequence_.length() == kNoCodeAgeSequenceLength); | 
| // The sequence of instructions that is patched out for aging code is the | 
| // following boilerplate stack-building prologue that is found both in | 
|  |