[Cherrypick try #2] Fix computation of runtime for throttled tasks

components/scheduler/base/time_domain_unittest.cc

 // 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/time_domain.h"
 
 #include "base/macros.h"
 #include "base/test/simple_test_tick_clock.h"
 #include "cc/test/ordered_simple_task_runner.h"
 #include "components/scheduler/base/task_queue_impl.h"
@@ skipping 21 matching lines @@
   using TimeDomain::NextScheduledRunTime;
   using TimeDomain::NextScheduledTaskQueue;
   using TimeDomain::ScheduleDelayedWork;
   using TimeDomain::UnregisterQueue;
   using TimeDomain::UpdateWorkQueues;
   using TimeDomain::RegisterAsUpdatableTaskQueue;
 
   // TimeSource implementation:
   LazyNow CreateLazyNow() override { return LazyNow(now_); }
 
+  base::TimeTicks ComputeDelayedRunTime(base::TimeTicks time_domain_now,
+                                        base::TimeDelta delay) const override {
+    return time_domain_now + delay;
+  }
+
   void AsValueIntoInternal(
       base::trace_event::TracedValue* state) const override {}
 
   bool MaybeAdvanceTime() override { return false; }
   const char* GetName() const override { return "Test"; }
   void OnRegisterWithTaskQueueManager(
       TaskQueueManager* task_queue_manager) override {}
 
   MOCK_METHOD2(RequestWakeup, void(LazyNow* lazy_now, base::TimeDelta delay));
 
@@ skipping 187 matching lines @@
 TEST_F(TimeDomainWithObserverTest, OnTimeDomainHasDelayedWork) {
   EXPECT_CALL(*observer_, OnTimeDomainHasDelayedWork());
   EXPECT_CALL(*time_domain_.get(), RequestWakeup(_, _));
   LazyNow lazy_now = time_domain_->CreateLazyNow();
   time_domain_->ScheduleDelayedWork(
       task_queue_.get(),
       time_domain_->Now() + base::TimeDelta::FromMilliseconds(10), &lazy_now);
 }
 
 }  // namespace scheduler