Mark QUIC broken when the network blackholes after the handshake

net/quic/test_tools/test_task_runner.cc

Index: net/quic/test_tools/test_task_runner.cc
diff --git a/net/quic/test_tools/test_task_runner.cc b/net/quic/test_tools/test_task_runner.cc
index 61d0700e1fa38fedec7849c04d6056bee690f28d..ad1a31826308472b6ec258233b9cab3c0c563cd8 100644
--- a/net/quic/test_tools/test_task_runner.cc
+++ b/net/quic/test_tools/test_task_runner.cc
@@ -35,8 +35,6 @@ const std::vector<PostedTask>& TestTaskRunner::GetPostedTasks() const {
 }
 
 void TestTaskRunner::RunNextTask() {
-  // Find the next task to run, advance the time to the correct time
-  // and then run the task.
   std::vector<PostedTask>::iterator next = FindNextTask();
   DCHECK(next != tasks_.end());
   clock_->AdvanceTime(QuicTime::Delta::FromMicroseconds(
@@ -46,6 +44,10 @@ void TestTaskRunner::RunNextTask() {
   std::move(task.task).Run();
 }
 
+void TestTaskRunner::RunUntilIdle() {
+  while (!tasks_.empty())
+    RunNextTask();
+}
 namespace {
 
 struct ShouldRunBeforeLessThan {