Revert of Dont post delayed DoWork for disabled queues.

third_party/WebKit/Source/platform/testing/TestingPlatformSupport.cpp

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 199 matching lines @@
 TestingPlatformSupportWithMockScheduler::
     TestingPlatformSupportWithMockScheduler(const Config& config)
     : TestingPlatformSupport(config),
       m_clock(new base::SimpleTestTickClock()),
       m_mockTaskRunner(new cc::OrderedSimpleTaskRunner(m_clock.get(), true)),
       m_scheduler(new scheduler::RendererSchedulerImpl(
           scheduler::SchedulerTqmDelegateForTest::Create(
               m_mockTaskRunner,
               base::WrapUnique(new scheduler::TestTimeSource(m_clock.get()))))),
       m_thread(m_scheduler->CreateMainThread()) {
-  // We need a non-zero start time because LazyNow in the blink scheduler can't
-  // be initialized with time t = 0;
-  m_clock->Advance(base::TimeDelta::FromSeconds(1));
-
   // Set the work batch size to one so RunPendingTasks behaves as expected.
   m_scheduler->GetSchedulerHelperForTesting()->SetWorkBatchSizeForTesting(1);
 
   WTF::setTimeFunctionsForTesting(getTestTime);
 }
 
 TestingPlatformSupportWithMockScheduler::
     ~TestingPlatformSupportWithMockScheduler() {
   WTF::setTimeFunctionsForTesting(nullptr);
   m_scheduler->Shutdown();
@@ skipping 108 matching lines @@
   ProcessHeap::init();
   ThreadState::attachMainThread();
   ThreadState::current()->registerTraceDOMWrappers(nullptr, nullptr, nullptr,
                                                    nullptr);
   HTTPNames::init();
 }
 
 ScopedUnittestsEnvironmentSetup::~ScopedUnittestsEnvironmentSetup() {}
 
 }  // namespace blink