Plumb Task Scheduler Histograms to the Task Scheduler Internals Page

base/task_scheduler/scheduler_worker_pool_impl.cc

 // 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.
 
 #include "base/task_scheduler/scheduler_worker_pool_impl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <utility>
@@ skipping 429 matching lines @@
                                              sequence_sort_key);
 
     // Wake up a worker to process |sequence|.
     if (worker)
       WakeUpWorker(worker);
     else
       WakeUpOneWorker();
   }
 }
 
+void SchedulerWorkerPoolImpl::GetHistograms(
+    std::vector<const HistogramBase*>* histograms) const {
+  histograms->push_back(detach_duration_histogram_);
+  histograms->push_back(num_tasks_between_waits_histogram_);
+}
+
 SchedulerWorkerPoolImpl::SchedulerSingleThreadTaskRunner::
     SchedulerSingleThreadTaskRunner(const TaskTraits& traits,
                                     SchedulerWorkerPool* worker_pool,
                                     SchedulerWorker* worker)
     : traits_(traits),
       worker_pool_(worker_pool),
       worker_(worker) {
   DCHECK(worker_pool_);
   DCHECK(worker_);
   static_cast<SchedulerWorkerDelegateImpl*>(worker_->delegate())->
@@ skipping 326 matching lines @@
   AutoSchedulerLock auto_lock(idle_workers_stack_lock_);
   idle_workers_stack_.Remove(worker);
 }
 
 bool SchedulerWorkerPoolImpl::CanWorkerDetachForTesting() {
   return !worker_detachment_disallowed_.IsSet();
 }
 
 }  // namespace internal
 }  // namespace base