cc: Add HasPendingNotification to delayed unique notifier.

cc/base/delayed_unique_notifier_unittest.cc

Index: cc/base/delayed_unique_notifier_unittest.cc
diff --git a/cc/base/delayed_unique_notifier_unittest.cc b/cc/base/delayed_unique_notifier_unittest.cc
index 113146a082cbb58a4da62902d13382428a87f2da..a2dd273b9109c3aa3a822795acce54452331b5e9 100644
--- a/cc/base/delayed_unique_notifier_unittest.cc
+++ b/cc/base/delayed_unique_notifier_unittest.cc
@@ -192,7 +192,7 @@ TEST_F(DelayedUniqueNotifierTest, RescheduleDelay) {
   EXPECT_EQ(1, NotificationCount());
 }
 
-TEST_F(DelayedUniqueNotifierTest, Cancel) {
+TEST_F(DelayedUniqueNotifierTest, CancelAndHasPendingNotification) {
   base::TimeDelta delay = base::TimeDelta::FromInternalValue(20);
   TestNotifier notifier(
       task_runner_,
@@ -206,9 +206,11 @@ TEST_F(DelayedUniqueNotifierTest, Cancel) {
       notifier.Now() + base::TimeDelta::FromInternalValue(10);
   notifier.SetNow(schedule_time);
   notifier.Schedule();
+  EXPECT_TRUE(notifier.HasPendingNotification());
 
   // Cancel the run.
   notifier.Cancel();
+  EXPECT_FALSE(notifier.HasPendingNotification());
 
   std::deque<base::TestPendingTask> tasks = TakePendingTasks();
 
@@ -218,11 +220,13 @@ TEST_F(DelayedUniqueNotifierTest, Cancel) {
   // Time to run, but a canceled task!
   tasks[0].task.Run();
   EXPECT_EQ(0, NotificationCount());
+  EXPECT_FALSE(notifier.HasPendingNotification());
 
   tasks = TakePendingTasks();
   EXPECT_EQ(0u, tasks.size());
 
   notifier.Schedule();
+  EXPECT_TRUE(notifier.HasPendingNotification());
   tasks = TakePendingTasks();
 
   ASSERT_EQ(1u, tasks.size());
@@ -234,11 +238,14 @@ TEST_F(DelayedUniqueNotifierTest, Cancel) {
   // This should run since it wasn't scheduled.
   tasks[0].task.Run();
   EXPECT_EQ(1, NotificationCount());
+  EXPECT_FALSE(notifier.HasPendingNotification());
 
   for (int i = 0; i < 10; ++i)
     notifier.Schedule();
 
+  EXPECT_TRUE(notifier.HasPendingNotification());
   notifier.Cancel();

[reveman, 2014/05/30 00:19:28]

While here, can you move this Cancel() call to the loop above to make sure that
calling Schedule() and Cancel() repetitively result in only one pending task.

[vmpstr, 2014/05/30 00:38:34]

Done.

+  EXPECT_FALSE(notifier.HasPendingNotification());
   tasks = TakePendingTasks();
 
   ASSERT_EQ(1u, tasks.size());
@@ -251,6 +258,7 @@ TEST_F(DelayedUniqueNotifierTest, Cancel) {
 
   tasks = TakePendingTasks();
   EXPECT_EQ(0u, tasks.size());
+  EXPECT_FALSE(notifier.HasPendingNotification());
 }
 
 }  // namespace