base::Bind: Remove Task.

base/task.h

Index: base/task.h
diff --git a/base/task.h b/base/task.h
index 571f2748c7014da534d82432b8d18e2067497730..7bede80de5aa3333e326a3aebbebc5e905197fb0 100644
--- a/base/task.h
+++ b/base/task.h
@@ -42,20 +42,6 @@ namespace base {
 const size_t kDeadTask = 0xDEAD7A53;
 }
 
-// Task ------------------------------------------------------------------------
-//
-// A task is a generic runnable thingy, usually used for running code on a
-// different thread or for scheduling future tasks off of the message loop.
-
-class BASE_EXPORT Task {
- public:
-  Task();
-  virtual ~Task();
-
-  // Tasks are automatically deleted after Run is called.
-  virtual void Run() = 0;
-};
-
 template<typename T>
 void DeletePointer(T* obj) {
   delete obj;
@@ -83,44 +69,6 @@ class BASE_EXPORT ScopedClosureRunner {
   DISALLOW_IMPLICIT_CONSTRUCTORS(ScopedClosureRunner);
 };
 
-namespace subtle {
-
-// This class is meant for use in the implementation of MessageLoop classes
-// such as MessageLoop, MessageLoopProxy, BrowserThread, and WorkerPool to
-// implement the compatibility APIs while we are transitioning from Task to
-// Callback.
-//
-// It should NOT be used anywhere else!
-//
-// In particular, notice that this is RefCounted instead of
-// RefCountedThreadSafe.  We rely on the fact that users of this class are
-// careful to ensure that a lock is taken during transfer of ownership for
-// objects from this class to ensure the refcount is not corrupted.
-class TaskClosureAdapter : public RefCounted<TaskClosureAdapter> {
- public:
-  explicit TaskClosureAdapter(Task* task);
-
-  // |should_leak_task| points to a flag variable that can be used to determine
-  // if this class should leak the Task on destruction.  This is important
-  // at MessageLoop shutdown since not all tasks can be safely deleted without
-  // running.  See MessageLoop::DeletePendingTasks() for the exact behavior
-  // of when a Task should be deleted. It is subtle.
-  TaskClosureAdapter(Task* task, bool* should_leak_task);
-
-  void Run();
-
- private:
-  friend class base::RefCounted<TaskClosureAdapter>;
-
-  ~TaskClosureAdapter();
-
-  Task* task_;
-  bool* should_leak_task_;
-  static bool kTaskLeakingDefault;
-};
-
-}  // namespace subtle
-
 }  // namespace base
 
 #endif  // BASE_TASK_H_