| Index: base/synchronization/lock_impl.h | 
| diff --git a/base/synchronization/lock_impl.h b/base/synchronization/lock_impl.h | 
| index cbaabc784b109cb0723a71417d6ac4881de064bc..603585a05041764e20c41c17f57504130ba82110 100644 | 
| --- a/base/synchronization/lock_impl.h | 
| +++ b/base/synchronization/lock_impl.h | 
| @@ -48,6 +48,11 @@ class BASE_EXPORT LockImpl { | 
| // unnecessary. | 
| NativeHandle* native_handle() { return &native_handle_; } | 
|  | 
| +#if defined(OS_POSIX) | 
| +  // Whether this lock will attempt to use priority inheritance. | 
| +  static bool PriorityInheritanceAvailable(); | 
| +#endif | 
| + | 
| private: | 
| NativeHandle native_handle_; | 
|  | 
|  |