Chromium Code Reviews| Index: src/log.h | 
| diff --git a/src/log.h b/src/log.h | 
| index 129738757e2d8877076e9e73fa70f43d54d01389..e54f0413e9837cb6468b4a523bea4d27920a92a7 100644 | 
| --- a/src/log.h | 
| +++ b/src/log.h | 
| @@ -454,6 +454,7 @@ class SamplerRegistry : public AllStatic { | 
| return active_samplers_ != NULL && !active_samplers_->is_empty(); | 
| } | 
| + static Mutex* mutex_; // Protects the state below. | 
| static List<Sampler*>* active_samplers_; | 
| DISALLOW_IMPLICIT_CONSTRUCTORS(SamplerRegistry); |