use SkAutoTDelete instead of SkTScopedPtr

include/core/SkTemplates.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 SkTemplates_DEFINED
@@ skipping 62 matching lines @@
 */
 template <typename T, int (*P)(T*)> class SkAutoTCallIProc : SkNoncopyable {
 public:
     SkAutoTCallIProc(T* obj): fObj(obj) {}
     ~SkAutoTCallIProc() { if (fObj) P(fObj); }
     T* detach() { T* obj = fObj; fObj = NULL; return obj; }
 private:
     T* fObj;
 };
 
-// See also SkTScopedPtr.
 template <typename T> class SkAutoTDelete : SkNoncopyable {
 public:
-    SkAutoTDelete(T* obj) : fObj(obj) {}
+    SkAutoTDelete(T* obj = NULL) : fObj(obj) {}
     ~SkAutoTDelete() { delete fObj; }
 
     T* get() const { return fObj; }
     T& operator*() const { SkASSERT(fObj); return *fObj; }
     T* operator->() const { SkASSERT(fObj); return fObj; }
 
+    void reset(T* obj) {
+        if (fObj != obj) {
+            delete fObj;
+            fObj = obj;
+        }
+    }
+
     /**
      *  Delete the owned object, setting the internal pointer to NULL.
      */
     void free() {
         delete fObj;
         fObj = NULL;
     }
 
     /**
      *  Transfer ownership of the object to the caller, setting the internal
@@ skipping 246 matching lines @@
     /**
      * Returns void* because this object does not initialize the
      * memory. Use placement new for types that require a cons.
      */
     void* get() { return fStorage.get(); }
 private:
     SkAlignedSStorage<sizeof(T)*N> fStorage;
 };
 
 #endif