Remove DeleteTask and convert remaining users.

base/task.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // ============================================================================
 // ****************************************************************************
 // *  THIS HEADER IS DEPRECATED, SEE base/callback.h FOR NEW IMPLEMENTATION   *
 // ****************************************************************************
 // ============================================================================
 // ============================================================================
@@ skipping 187 matching lines @@
     Method meth_;
     Params params_;
 
     DISALLOW_COPY_AND_ASSIGN(RunnableMethod);
   };
 
  private:
   base::WeakPtrFactory<T> weak_factory_;
 };
 
-// General task implementations ------------------------------------------------
-
-// Task to delete an object
-template<class T>
-class DeleteTask : public CancelableTask {
- public:
-  explicit DeleteTask(const T* obj) : obj_(obj) {
-  }
-  virtual void Run() {
-    delete obj_;
-  }
-  virtual void Cancel() {
-    obj_ = NULL;
-  }
-
- private:
-  const T* obj_;
-};
-
-// Equivalents for use by base::Bind().
+// Delete helper for use with base::Bind().
 template<typename T>
 void DeletePointer(T* obj) {
   delete obj;
 }
 
 // RunnableMethodTraits --------------------------------------------------------
 //
 // This traits-class is used by RunnableMethod to manage the lifetime of the
 // callee object.  By default, it is assumed that the callee supports AddRef
 // and Release methods.  A particular class can specialize this template to
@@ skipping 378 matching lines @@
   Task* task_;
   bool* should_leak_task_;
   static bool kTaskLeakingDefault;
 };
 
 }  // namespace subtle
 
 }  // namespace base
 
 #endif  // BASE_TASK_H_