base::Bind: Remove CancelableTask and ScopedTaskRunner.

base/task.h

 // Copyright (c) 2012 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 38 matching lines @@
 
 class BASE_EXPORT Task {
  public:
   Task();
   virtual ~Task();
 
   // Tasks are automatically deleted after Run is called.
   virtual void Run() = 0;
 };
 
-class BASE_EXPORT CancelableTask : public Task {
- public:
-  CancelableTask();
-  virtual ~CancelableTask();
-
-  // Not all tasks support cancellation.
-  virtual void Cancel() = 0;
-};
-
 template<typename T>
 void DeletePointer(T* obj) {
   delete obj;
 }
 
 namespace base {
 
-// ScopedTaskRunner is akin to scoped_ptr for Tasks.  It ensures that the Task
-// is executed and deleted no matter how the current scope exits.
-class BASE_EXPORT ScopedTaskRunner {
- public:
-  // Takes ownership of the task.
-  explicit ScopedTaskRunner(Task* task);
-  ~ScopedTaskRunner();
-
-  Task* Release();
-
- private:
-  Task* task_;
-
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ScopedTaskRunner);
-};
-
+// ScopedClosureRunner is akin to scoped_ptr for Closures. It ensures that the
+// Closure is executed and deleted no matter how the current scope exits.
 class BASE_EXPORT ScopedClosureRunner {
  public:
   explicit ScopedClosureRunner(const Closure& closure);
   ~ScopedClosureRunner();
 
   Closure Release();
 
  private:
   Closure closure_;
 
@@ skipping 34 matching lines @@
   Task* task_;
   bool* should_leak_task_;
   static bool kTaskLeakingDefault;
 };
 
 }  // namespace subtle
 
 }  // namespace base
 
 #endif  // BASE_TASK_H_