scheduler: Convert enums to enum classes

content/renderer/scheduler/task_queue_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 CONTENT_RENDERER_SCHEDULER_TASK_QUEUE_MANAGER_H_
 #define CONTENT_RENDERER_SCHEDULER_TASK_QUEUE_MANAGER_H_
 
 #include "base/atomic_sequence_num.h"
 #include "base/debug/task_annotator.h"
 #include "base/macros.h"
@@ skipping 30 matching lines @@
 //    When a task is appended into an empty incoming queue, the task manager
 //    work function (DoWork) is scheduled to run on the main task runner.
 //
 // 2. Work queue. If a work queue is empty when DoWork() is entered, tasks from
 //    the incoming task queue (if any) are moved here. The work queues are
 //    registered with the selector as input to the scheduling decision.
 //
 class CONTENT_EXPORT TaskQueueManager {
  public:
   // Keep TaskQueue::PumpPolicyToString in sync with this enum.
-  enum PumpPolicy {
-    // Tasks posted to an incoming queue with an AUTO_PUMP_POLICY will be
+  enum class PumpPolicy {
+    // Tasks posted to an incoming queue with an AUTO pump policy will be
     // automatically scheduled for execution or transferred to the work queue
     // automatically.
-    AUTO_PUMP_POLICY,
-    // Tasks posted to an incoming queue with an AUTO_PUMP_AFTER_WAKEUP_POLICY
+    AUTO,
+    // Tasks posted to an incoming queue with an AFTER_WAKEUP pump policy
     // will be scheduled for execution or transferred to the work queue
     // automatically but only after another queue has executed a task.
-    AUTO_PUMP_AFTER_WAKEUP_POLICY,
-    // Tasks posted to an incoming queue with a MANUAL_PUMP_POLICY will not be
+    AFTER_WAKEUP,
+    // Tasks posted to an incoming queue with a MANUAL will not be
     // automatically scheduled for execution or transferred to the work queue.
     // Instead, the selector should call PumpQueue() when necessary to bring
     // in new tasks for execution.
-    MANUAL_PUMP_POLICY
+    MANUAL
   };
 
   // Create a task queue manager with |task_queue_count| task queues.
   // |main_task_runner| identifies the thread on which where the tasks are
   // eventually run. |selector| is used to choose which task queue to service.
   // It should outlive this class.
   TaskQueueManager(size_t task_queue_count,
                    scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
                    TaskQueueSelector* selector);
   ~TaskQueueManager();
@@ skipping 34 matching lines @@
   // These functions can only be called on the same thread that the task queue
   // manager executes its tasks on.
   void AddTaskObserver(base::MessageLoop::TaskObserver* task_observer);
   void RemoveTaskObserver(base::MessageLoop::TaskObserver* task_observer);
 
   void SetTimeSourceForTesting(scoped_refptr<cc::TestNowSource> time_source);
 
  private:
   friend class internal::TaskQueue;
 
-  enum WorkQueueUpdateEventType {
-    BEFORE_WAKEUP_EVENT_TYPE,
-    AFTER_WAKEUP_EVENT_TYPE
-  };
+  enum class WorkQueueUpdateEventType { BEFORE_WAKEUP, AFTER_WAKEUP };
 
   // Called by the task queue to register a new pending task and allocate a
   // sequence number for it.
   void DidQueueTask(base::PendingTask* pending_task);
 
   // Post a task to call DoWork() on the main task runner.  Only one pending
   // DoWork is allowed from the main thread, to prevent an explosion of pending
   // DoWorks.
   void MaybePostDoWorkOnMainRunner();
 
@@ skipping 56 matching lines @@
   ObserverList<base::MessageLoop::TaskObserver> task_observers_;
 
   base::WeakPtrFactory<TaskQueueManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskQueueManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_SCHEDULER_TASK_QUEUE_MANAGER_H_