(reland) Adds TimeDomains to the TaskQueueManager

components/scheduler/base/virtual_time_domain.cc

Index: components/scheduler/base/virtual_time_domain.cc
diff --git a/components/scheduler/base/virtual_time_domain.cc b/components/scheduler/base/virtual_time_domain.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a7ed295fa2414328287727498caa02c5ca7de9dc
--- /dev/null
+++ b/components/scheduler/base/virtual_time_domain.cc
@@ -0,0 +1,44 @@
+// Copyright 2015 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 "components/scheduler/base/virtual_time_domain.h"
+
+#include "base/bind.h"
+#include "components/scheduler/base/task_queue_impl.h"
+#include "components/scheduler/base/task_queue_manager_delegate.h"
+
+namespace scheduler {
+
+VirtualTimeDomain::VirtualTimeDomain(base::TimeTicks initial_time)
+    : now_(initial_time) {}
+
+VirtualTimeDomain::~VirtualTimeDomain() {}
+
+LazyNow VirtualTimeDomain::GetLazyNow() {
+  return LazyNow(now_);
+}
+
+void VirtualTimeDomain::RequestWakeup(base::TimeDelta delay) {
+  // We don't need to do anything here because AdvanceTo triggers delayed tasks.
+}
+
+bool VirtualTimeDomain::MaybeAdvanceTime() {
+  return false;
+}
+
+void VirtualTimeDomain::AsValueIntoInternal(
+    base::trace_event::TracedValue* state) const {}
+
+void VirtualTimeDomain::AdvanceTo(base::TimeTicks now) {
+  DCHECK_GE(now, now_);
+  now_ = now;
+  LazyNow lazy_now(now_);
+  WakeupReadyDelayedQueues(&lazy_now);
+}
+
+const char* VirtualTimeDomain::GetName() const {
+  return "VirtualTimeDomain";
+}
+
+}  // namespace scheduler