Move TaskQueueFactory from Call::Create parameter to CallConfig

to decouple it from other optional parameters
and with plan to make it mandatory

Bug: webrtc:10284
Change-Id: I71c1d3d9eaf09d00b99b0bc4c811ab173ea5f01f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/130473
Reviewed-by: Niels Moller <nisse@webrtc.org>
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27385}
diff --git a/call/call.cc b/call/call.cc
index 3f7ef5f..e458c48 100644
--- a/call/call.cc
+++ b/call/call.cc
@@ -424,16 +424,20 @@
 }
 
 Call* Call::Create(const Call::Config& config) {
-  return Create(
-      config, Clock::GetRealTimeClock(), ProcessThread::Create("PacerThread"),
-      ProcessThread::Create("ModuleProcessThread"), &GlobalTaskQueueFactory());
+  return Create(config, Clock::GetRealTimeClock(),
+                ProcessThread::Create("PacerThread"),
+                ProcessThread::Create("ModuleProcessThread"));
 }
 
 Call* Call::Create(const Call::Config& config,
                    Clock* clock,
                    std::unique_ptr<ProcessThread> call_thread,
-                   std::unique_ptr<ProcessThread> pacer_thread,
-                   TaskQueueFactory* task_queue_factory) {
+                   std::unique_ptr<ProcessThread> pacer_thread) {
+  // TODO(bugs.webrtc.org/10284): DCHECK task_queue_factory dependency is
+  // always provided in the config.
+  TaskQueueFactory* task_queue_factory = config.task_queue_factory
+                                             ? config.task_queue_factory
+                                             : &GlobalTaskQueueFactory();
   return new internal::Call(
       clock, config,
       absl::make_unique<RtpTransportControllerSend>(