Convert //chrome/browser/sync_file_system from scoped_ptr to std::unique_ptr

chrome/browser/sync_file_system/drive_backend/sync_task_manager.h

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_MANAGER_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_MANAGER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
+#include <memory>
 #include <queue>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/sequence_checker.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/sync_file_system/drive_backend/task_dependency_manager.h"
 #include "chrome/browser/sync_file_system/sync_callbacks.h"
 #include "chrome/browser/sync_file_system/sync_status_code.h"
 #include "chrome/browser/sync_file_system/task_logger.h"
 
 namespace base {
 class SequencedTaskRunner;
@@ skipping 13 matching lines @@
 // This class manages asynchronous tasks for Sync FileSystem.  Each task must be
 // either a Task or a SyncTask.
 // The instance runs single task as the foreground task, and multiple tasks as
 // background tasks.  Running background task has a TaskBlocker that
 // describes which task can run in parallel.  When a task start running as a
 // background task, SyncTaskManager checks if any running background task
 // doesn't block the new background task, and queues it up if it can't run.
 class SyncTaskManager {
  public:
   typedef base::Callback<void(const SyncStatusCallback& callback)> Task;
-  typedef base::Callback<void(scoped_ptr<SyncTaskToken> token)> Continuation;
+  typedef base::Callback<void(std::unique_ptr<SyncTaskToken> token)>
+      Continuation;
 
   enum Priority {
     PRIORITY_LOW,
     PRIORITY_MED,
     PRIORITY_HIGH,
   };
 
   class Client {
    public:
     virtual ~Client() {}
 
     // Called when the manager is idle.
     virtual void MaybeScheduleNextTask() = 0;
 
     // Called when the manager is notified a task is done.
     virtual void NotifyLastOperationStatus(
         SyncStatusCode last_operation_status,
         bool last_operation_used_network) = 0;
 
-    virtual void RecordTaskLog(scoped_ptr<TaskLogger::TaskLog> task_log) = 0;
+    virtual void RecordTaskLog(
+        std::unique_ptr<TaskLogger::TaskLog> task_log) = 0;
   };
 
   // Runs at most |maximum_background_tasks| parallel as background tasks.
   // If |maximum_background_tasks| is zero, all task runs as foreground task.
   SyncTaskManager(base::WeakPtr<Client> client,
                   size_t maximum_background_task,
                   const scoped_refptr<base::SequencedTaskRunner>& task_runner,
                   const scoped_refptr<base::SequencedWorkerPool>& worker_pool);
   virtual ~SyncTaskManager();
 
   // This needs to be called to start task scheduling.
   // If |status| is not SYNC_STATUS_OK calling this may change the
   // service status. This should not be called more than once.
   void Initialize(SyncStatusCode status);
 
   // Schedules a task at the given priority.
   void ScheduleTask(const tracked_objects::Location& from_here,
                     const Task& task,
                     Priority priority,
                     const SyncStatusCallback& callback);
   void ScheduleSyncTask(const tracked_objects::Location& from_here,
-                        scoped_ptr<SyncTask> task,
+                        std::unique_ptr<SyncTask> task,
                         Priority priority,
                         const SyncStatusCallback& callback);
 
   // Runs the posted task only when we're idle.  Returns true if tha task is
   // scheduled.
   bool ScheduleTaskIfIdle(const tracked_objects::Location& from_here,
                           const Task& task,
                           const SyncStatusCallback& callback);
   bool ScheduleSyncTaskIfIdle(const tracked_objects::Location& from_here,
-                              scoped_ptr<SyncTask> task,
+                              std::unique_ptr<SyncTask> task,
                               const SyncStatusCallback& callback);
 
   // Notifies SyncTaskManager that the task associated to |token| has finished
   // with |status|.
-  static void NotifyTaskDone(scoped_ptr<SyncTaskToken> token,
+  static void NotifyTaskDone(std::unique_ptr<SyncTaskToken> token,
                              SyncStatusCode status);
 
   // Updates |task_blocker| associated to the current task by specified
   // |task_blocker| and turns the current task to a background task if
   // the current task is running as a foreground task.
   // If specified |task_blocker| is blocked by any other blocking factor
   // associated to an existing background task, this function waits for the
   // existing background task to finish.
   // Upon the task is ready to run as a background task, calls |continuation|
   // with new SyncTaskToken.
   // Note that this function once releases previous |task_blocker| before
   // applying new |task_blocker|.  So, any other task may be run before
   // invocation of |continuation|.
-  static void UpdateTaskBlocker(scoped_ptr<SyncTaskToken> current_task_token,
-                                scoped_ptr<TaskBlocker> task_blocker,
-                                const Continuation& continuation);
+  static void UpdateTaskBlocker(
+      std::unique_ptr<SyncTaskToken> current_task_token,
+      std::unique_ptr<TaskBlocker> task_blocker,
+      const Continuation& continuation);
 
   bool IsRunningTask(int64_t task_token_id) const;
 
   void DetachFromSequence();
   bool ShouldTrackTaskToken() const;
 
  private:
   struct PendingTask {
     base::Closure task;
     Priority priority;
     int64_t seq;
 
     PendingTask();
     PendingTask(const base::Closure& task, Priority pri, int seq);
     PendingTask(const PendingTask& other);
     ~PendingTask();
   };
 
   struct PendingTaskComparator {
     bool operator()(const PendingTask& left,
                     const PendingTask& right) const;
   };
 
   // Non-static version of NotifyTaskDone.
-  void NotifyTaskDoneBody(scoped_ptr<SyncTaskToken> token,
+  void NotifyTaskDoneBody(std::unique_ptr<SyncTaskToken> token,
                           SyncStatusCode status);
 
   // Non-static version of UpdateTaskBlocker.
-  void UpdateTaskBlockerBody(scoped_ptr<SyncTaskToken> foreground_task_token,
-                             scoped_ptr<SyncTaskToken> background_task_token,
-                             scoped_ptr<TaskLogger::TaskLog> task_log,
-                             scoped_ptr<TaskBlocker> task_blocker,
-                             const Continuation& continuation);
+  void UpdateTaskBlockerBody(
+      std::unique_ptr<SyncTaskToken> foreground_task_token,
+      std::unique_ptr<SyncTaskToken> background_task_token,
+      std::unique_ptr<TaskLogger::TaskLog> task_log,
+      std::unique_ptr<TaskBlocker> task_blocker,
+      const Continuation& continuation);
 
   // This should be called when an async task needs to get a task token.
-  scoped_ptr<SyncTaskToken> GetToken(const tracked_objects::Location& from_here,
-                                     const SyncStatusCallback& callback);
+  std::unique_ptr<SyncTaskToken> GetToken(
+      const tracked_objects::Location& from_here,
+      const SyncStatusCallback& callback);
 
-  scoped_ptr<SyncTaskToken> GetTokenForBackgroundTask(
+  std::unique_ptr<SyncTaskToken> GetTokenForBackgroundTask(
       const tracked_objects::Location& from_here,
       const SyncStatusCallback& callback,
-      scoped_ptr<TaskBlocker> task_blocker);
+      std::unique_ptr<TaskBlocker> task_blocker);
 
   void PushPendingTask(const base::Closure& closure, Priority priority);
 
-  void RunTask(scoped_ptr<SyncTaskToken> token,
-               scoped_ptr<SyncTask> task);
+  void RunTask(std::unique_ptr<SyncTaskToken> token,
+               std::unique_ptr<SyncTask> task);
 
   // Runs a pending task as a foreground task if possible.
   // If |token| is non-nullptr, put |token| back to |token_| beforehand.
-  void MaybeStartNextForegroundTask(scoped_ptr<SyncTaskToken> token);
+  void MaybeStartNextForegroundTask(std::unique_ptr<SyncTaskToken> token);
 
   base::WeakPtr<Client> client_;
 
   // Owns running SyncTask to cancel the task on SyncTaskManager deletion.
-  scoped_ptr<SyncTask> running_foreground_task_;
+  std::unique_ptr<SyncTask> running_foreground_task_;
 
   // Owns running backgrounded SyncTask to cancel the task on SyncTaskManager
   // deletion.
-  base::ScopedPtrHashMap<int64_t, scoped_ptr<SyncTask>>
+  base::ScopedPtrHashMap<int64_t, std::unique_ptr<SyncTask>>
       running_background_tasks_;
 
   size_t maximum_background_task_;
 
   // Holds pending continuation to move task to background.
   base::Closure pending_backgrounding_task_;
 
   std::priority_queue<PendingTask, std::vector<PendingTask>,
                       PendingTaskComparator> pending_tasks_;
   int64_t pending_task_seq_;
   int64_t task_token_seq_;
 
   // Absence of |token_| implies a task is running. Incoming tasks should
   // wait for the task to finish in |pending_tasks_| if |token_| is null.
   // Each task must take TaskToken instance from |token_| and must hold it
   // until it finished. And the task must return the instance through
   // NotifyTaskDone when the task finished.
-  scoped_ptr<SyncTaskToken> token_;
+  std::unique_ptr<SyncTaskToken> token_;
 
   TaskDependencyManager dependency_manager_;
 
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
   scoped_refptr<base::SequencedWorkerPool> worker_pool_;
   base::SequenceChecker sequence_checker_;
 
   base::WeakPtrFactory<SyncTaskManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncTaskManager);
 };
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_MANAGER_H_