[Reland] Dont post delayed DoWork for disabled queues.

third_party/WebKit/Source/platform/scheduler/base/task_queue_manager_unittest.cc

Index: third_party/WebKit/Source/platform/scheduler/base/task_queue_manager_unittest.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager_unittest.cc b/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager_unittest.cc
index 88d9331ce38ee3f4f15073ef3788aac159ef7c3e..c8fa20fb2930cd3f571e28dad1b1b84f17190d4b 100644
--- a/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager_unittest.cc
+++ b/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager_unittest.cc
@@ -2411,5 +2411,28 @@ TEST_F(TaskQueueManagerTest,
   run_loop.Run();
 }
 
+TEST_F(TaskQueueManagerTest, DelayedDoWorkNotPostedForDisabledQueue) {
+  Initialize(1u);
+
+  runners_[0]->PostDelayedTask(FROM_HERE, base::Bind(&NopTask),
+                               base::TimeDelta::FromMilliseconds(1));
+  EXPECT_TRUE(test_task_runner_->HasPendingTasks());
+  EXPECT_EQ(base::TimeDelta::FromMilliseconds(1),
+            test_task_runner_->DelayToNextTaskTime());
+
+  std::unique_ptr<TaskQueue::QueueEnabledVoter> voter =
+      runners_[0]->CreateQueueEnabledVoter();
+  voter->SetQueueEnabled(false);
+
+  EXPECT_TRUE(test_task_runner_->HasPendingTasks());
+  test_task_runner_->RemoveCancelledTasks();
+  EXPECT_FALSE(test_task_runner_->HasPendingTasks());
+
+  voter->SetQueueEnabled(true);
+  EXPECT_TRUE(test_task_runner_->HasPendingTasks());
+  EXPECT_EQ(base::TimeDelta::FromMilliseconds(1),
+            test_task_runner_->DelayToNextTaskTime());
+}
+
 }  // namespace scheduler
 }  // namespace blink