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diff --git a/base/task/sequence_manager/task_queue_selector_logic.h b/base/task/sequence_manager/task_queue_selector_logic.h
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+++ b/base/task/sequence_manager/task_queue_selector_logic.h
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+// Copyright 2015 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 BASE_TASK_SEQUENCE_MANAGER_TASK_QUEUE_SELECTOR_LOGIC_H_
+#define BASE_TASK_SEQUENCE_MANAGER_TASK_QUEUE_SELECTOR_LOGIC_H_
+
+namespace base {
+namespace sequence_manager {
+namespace internal {
+
+// Used to describe the logic trigerred when a task queue is selected to
+// service.
+// This enum is used for histograms and should not be renumbered.
+enum class TaskQueueSelectorLogic {
+
+  // Selected due to priority rules.
+  kControlPriorityLogic = 0,
+  kHighestPriorityLogic = 1,
+  kHighPriorityLogic = 2,
+  kNormalPriorityLogic = 3,
+  kLowPriorityLogic = 4,
+  kBestEffortPriorityLogic = 5,
+
+  // Selected due to starvation logic.
+  kHighPriorityStarvationLogic = 6,
+  kNormalPriorityStarvationLogic = 7,
+  kLowPriorityStarvationLogic = 8,
+
+  kCount = 9,
+};
+
+}  // namespace internal
+}  // namespace sequence_manager
+}  // namespace base
+
+#endif  // BASE_TASK_SEQUENCE_MANAGER_TASK_QUEUE_SELECTOR_LOGIC_H_