Plumb Task Scheduler Histograms to the Task Scheduler Internals Page

base/task_scheduler/scheduler_worker_pool_impl.cc

Index: base/task_scheduler/scheduler_worker_pool_impl.cc
diff --git a/base/task_scheduler/scheduler_worker_pool_impl.cc b/base/task_scheduler/scheduler_worker_pool_impl.cc
index ed8e84a336d6ac3015099e935e6ba2f0b6769598..7b029d6fa68556df1b49ef992b17374c8cd35738 100644
--- a/base/task_scheduler/scheduler_worker_pool_impl.cc
+++ b/base/task_scheduler/scheduler_worker_pool_impl.cc
@@ -440,6 +440,12 @@ void SchedulerWorkerPoolImpl::PostTaskWithSequenceNow(
   }
 }
 
+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,