Plumb Task Scheduler Histograms to the Task Scheduler Internals Page

base/task_scheduler/scheduler_worker_pool_impl.h

 // Copyright 2016 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_SCHEDULER_SCHEDULER_WORKER_POOL_IMPL_H_
 #define BASE_TASK_SCHEDULER_SCHEDULER_WORKER_POOL_IMPL_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 76 matching lines @@
       ExecutionMode execution_mode) override;
   void ReEnqueueSequence(scoped_refptr<Sequence> sequence,
                          const SequenceSortKey& sequence_sort_key) override;
   bool PostTaskWithSequence(std::unique_ptr<Task> task,
                             scoped_refptr<Sequence> sequence,
                             SchedulerWorker* worker) override;
   void PostTaskWithSequenceNow(std::unique_ptr<Task> task,
                                scoped_refptr<Sequence> sequence,
                                SchedulerWorker* worker) override;
 
-  const HistogramBase* num_tasks_between_waits_histogram_for_testing() const {
+  const HistogramBase* detach_duration_histogram() const {
+    return detach_duration_histogram_;
+  }
+
+  const HistogramBase* num_tasks_between_waits_histogram() const {
     return num_tasks_between_waits_histogram_;
   }
 
  private:
   class SchedulerSingleThreadTaskRunner;
   class SchedulerWorkerDelegateImpl;
 
   SchedulerWorkerPoolImpl(StringPiece name,
                           SchedulerWorkerPoolParams::IORestriction
                               io_restriction,
@@ skipping 88 matching lines @@
   TaskTracker* const task_tracker_;
   DelayedTaskManager* const delayed_task_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(SchedulerWorkerPoolImpl);
 };
 
 }  // namespace internal
 }  // namespace base
 
 #endif  // BASE_TASK_SCHEDULER_SCHEDULER_WORKER_POOL_IMPL_H_