Implement WebFrameScheduler and WebPageScheduler

components/scheduler/child/scheduler_helper_unittest.cc

Index: components/scheduler/child/scheduler_helper_unittest.cc
diff --git a/components/scheduler/child/scheduler_helper_unittest.cc b/components/scheduler/child/scheduler_helper_unittest.cc
index 2807186a853e3aa176fca7a4c5004b2c02cc19e4..5064c9d34e5f4565a25217395cad9a170f2ed2ea 100644
--- a/components/scheduler/child/scheduler_helper_unittest.cc
+++ b/components/scheduler/child/scheduler_helper_unittest.cc
@@ -183,4 +183,26 @@ TEST_F(SchedulerHelperTest,
   RunUntilIdle();
 }
 
+namespace {
+class MockObserver : public SchedulerHelper::Observer {
+ public:
+  MOCK_METHOD1(OnUnregisterTaskQueue,
+               void(const scoped_refptr<TaskQueue>& queue));
+};
+}  // namespace
+
+TEST_F(SchedulerHelperTest, OnUnregisterTaskQueue) {
+  MockObserver observer;
+  scheduler_helper_->SetQueueObserver(&observer);
+
+  scoped_refptr<TaskQueue> task_queue =
+      scheduler_helper_->NewTaskQueue(TaskQueue::Spec("test_queue"));
+
+  EXPECT_CALL(observer, OnUnregisterTaskQueue(_)).Times(1);
+  task_queue->UnregisterTaskQueue();
+
+  // Tidy up.
+  scheduler_helper_->SetQueueObserver(nullptr);
+}
+
 }  // namespace scheduler