1 files changed, 38 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/platform/scheduler/main_thread/non_waking_time_domain.h b/chromium/third_party/blink/renderer/platform/scheduler/main_thread/non_waking_time_domain.h
new file mode 100644
index 00000000000..9641ed9aa1b
--- /dev/null
+++ b/chromium/third_party/blink/renderer/platform/scheduler/main_thread/non_waking_time_domain.h
@@ -0,0 +1,38 @@
+// Copyright 2020 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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_SCHEDULER_MAIN_THREAD_NON_WAKING_TIME_DOMAIN_H_
+#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_SCHEDULER_MAIN_THREAD_NON_WAKING_TIME_DOMAIN_H_
+
+#include "base/task/sequence_manager/time_domain.h"
+#include "base/time/tick_clock.h"
+
+namespace blink {
+namespace scheduler {
+
+// A time domain which never generates wake-ups on its own. Useful for tasks
+// which should run only when the system is non-idle.
+class NonWakingTimeDomain : public base::sequence_manager::TimeDomain {
+ public:
+  explicit NonWakingTimeDomain(const base::TickClock* tick_clock);
+  ~NonWakingTimeDomain() override;
+
+  // TimeDomain:
+  base::sequence_manager::LazyNow CreateLazyNow() const override;
+  base::TimeTicks Now() const override;
+  base::Optional<base::TimeDelta> DelayTillNextTask(
+      base::sequence_manager::LazyNow* lazy_now) override;
+  bool MaybeFastForwardToNextTask(bool quit_when_idle_requested) override;
+  const char* GetName() const override;
+  void SetNextDelayedDoWork(base::sequence_manager::LazyNow* lazy_now,
+                            base::TimeTicks run_time) override;
+
+ private:
+  const base::TickClock* tick_clock_;
+};
+
+}  // namespace scheduler
+}  // namespace blink
+
+#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_SCHEDULER_MAIN_THREAD_NON_WAKING_TIME_DOMAIN_H_