Add support for multimedia timers to TaskQueue on Windows.

webrtc/base/task_queue_unittest.cc

Index: webrtc/base/task_queue_unittest.cc
diff --git a/webrtc/base/task_queue_unittest.cc b/webrtc/base/task_queue_unittest.cc
index 08123d073cef50fe0d936122fa5d6e4b1237733d..3761f8db998cbdf2a31c94858e897e083d7e54c0 100644
--- a/webrtc/base/task_queue_unittest.cc
+++ b/webrtc/base/task_queue_unittest.cc
@@ -112,7 +112,7 @@ TEST(TaskQueueTest, PostMultipleDelayed) {
   TaskQueue queue(kQueueName);
 
   std::vector<std::unique_ptr<Event>> events;
-  for (int i = 0; i < 10; ++i) {
+  for (int i = 0; i < 100; ++i) {
     events.push_back(std::unique_ptr<Event>(new Event(false, false)));
     queue.PostDelayedTask(
         Bind(&CheckCurrent, kQueueName, events.back().get(), &queue), 10);