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 4a9ee43fb08fec7f4a78868cda81336c5e37e5ff..d919b8aa70e1851179f40c05c453384519408972 100644
--- a/base/task_scheduler/scheduler_worker_pool_impl.cc
+++ b/base/task_scheduler/scheduler_worker_pool_impl.cc
@@ -447,6 +447,12 @@ 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,