Hide deprecated SingleThreadedTaskQueueForTest behind an accessor

this change is intentionally noop.
Goal is to minimize change that would replace the
SingleThreadedTaskQueueForTest with a regular task queue.

Bug: webrtc:10933
Change-Id: I6da768941af048de3716af13e41b8f0f1ccd4cab
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/157892
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29569}
diff --git a/video/video_quality_test.cc b/video/video_quality_test.cc
index 091c1f3..8f7d612 100644
--- a/video/video_quality_test.cc
+++ b/video/video_quality_test.cc
@@ -1189,7 +1189,7 @@
     network_behavior = std::move(injection_components_->sender_network);
   }
   return std::make_unique<test::LayerFilteringTransport>(
-      &task_queue_,
+      task_queue(),
       std::make_unique<FakeNetworkPipe>(clock_, std::move(network_behavior)),
       sender_call_.get(), kPayloadTypeVP8, kPayloadTypeVP9,
       params_.video[0].selected_tl, params_.ss[0].selected_sl,
@@ -1207,7 +1207,7 @@
     network_behavior = std::move(injection_components_->receiver_network);
   }
   return std::make_unique<test::DirectTransport>(
-      &task_queue_,
+      task_queue(),
       std::make_unique<FakeNetworkPipe>(clock_, std::move(network_behavior)),
       receiver_call_.get(), payload_type_map_);
 }
@@ -1255,7 +1255,7 @@
     recv_event_log_ = std::make_unique<RtcEventLogNull>();
   }
 
-  SendTask(RTC_FROM_HERE, &task_queue_,
+  SendTask(RTC_FROM_HERE, task_queue(),
            [this, &params, &send_transport, &recv_transport]() {
              Call::Config send_call_config(send_event_log_.get());
              Call::Config recv_call_config(recv_event_log_.get());
@@ -1286,9 +1286,9 @@
       static_cast<size_t>(params_.ss[0].selected_stream),
       params.ss[0].selected_sl, params_.video[0].selected_tl,
       is_quick_test_enabled, clock_, params_.logging.rtp_dump_name,
-      &task_queue_);
+      task_queue());
 
-  SendTask(RTC_FROM_HERE, &task_queue_, [&]() {
+  SendTask(RTC_FROM_HERE, task_queue(), [&]() {
     analyzer_->SetCall(sender_call_.get());
     analyzer_->SetReceiver(receiver_call_->Receiver());
     send_transport->SetReceiver(analyzer_.get());
@@ -1334,7 +1334,7 @@
 
   analyzer_->Wait();
 
-  SendTask(RTC_FROM_HERE, &task_queue_, [&]() {
+  SendTask(RTC_FROM_HERE, task_queue(), [&]() {
     StopThumbnails();
     Stop();
 
@@ -1477,7 +1477,7 @@
     recv_event_log_ = std::make_unique<RtcEventLogNull>();
   }
 
-  SendTask(RTC_FROM_HERE, &task_queue_, [&]() {
+  SendTask(RTC_FROM_HERE, task_queue(), [&]() {
     params_ = params;
     CheckParamsAndInjectionComponents();
 
@@ -1564,9 +1564,9 @@
     Start();
   });
 
-  test::PressEnterToContinue(&task_queue_);
+  test::PressEnterToContinue(task_queue());
 
-  SendTask(RTC_FROM_HERE, &task_queue_, [&]() {
+  SendTask(RTC_FROM_HERE, task_queue(), [&]() {
     Stop();
     DestroyStreams();