Add SkNVRefCnt::deref().

include/core/SkRefCnt.h

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkRefCnt_DEFINED
@@ skipping 244 matching lines @@
     SkNVRefCnt() : fRefCnt(1) {}
 
     // Implementation is pretty much the same as SkRefCntBase. All required barriers are the same:
     //   - unique() needs acquire when it returns true, and no barrier if it returns false;
     //   - ref() doesn't need any barrier;
     //   - unref() needs a release barrier, and an acquire if it's going to call delete.
 
     bool unique() const { return 1 == sk_acquire_load(&fRefCnt); }
     void    ref() const { sk_atomic_inc(&fRefCnt); }
     void  unref() const { if (1 == sk_atomic_dec(&fRefCnt)) { SkDELETE((const Derived*)this); } }
+    void  deref() const { this->unref(); }  // Chrome prefers to call deref().
 private:
     mutable int32_t fRefCnt;
 };
 
 #endif