Adds CreateTimeControllerBasedCallFactory.

Bug: webrtc:11255
Change-Id: I9614823761ff5d2eb4fe03342f255a81087b6449
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/166960
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30358}
diff --git a/api/test/create_time_controller.h b/api/test/create_time_controller.h
index 9c5b19b..f4bd3f2 100644
--- a/api/test/create_time_controller.h
+++ b/api/test/create_time_controller.h
@@ -12,6 +12,7 @@
 
 #include <memory>
 
+#include "api/call/call_factory_interface.h"
 #include "api/test/time_controller.h"
 
 namespace webrtc {
@@ -19,6 +20,11 @@
 std::unique_ptr<TimeController> CreateTimeController(
     ControlledAlarmClock* alarm);
 
+// This is creates a call factory that creates Call instances that are backed by
+// a time controller.
+std::unique_ptr<CallFactoryInterface> CreateTimeControllerBasedCallFactory(
+    TimeController* time_controller);
+
 }  // namespace webrtc
 
 #endif  // API_TEST_CREATE_TIME_CONTROLLER_H_