Move rtc::NewClosure into own build target as ToQueuedTask

to make it usable without need to depend on rtc_task_queue

Bug: webrtc:10191
Change-Id: I2ae1445cf5d498aa6928d66b6823f2f940987767
Reviewed-on: https://webrtc-review.googlesource.com/c/125084
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26942}
diff --git a/api/task_queue/BUILD.gn b/api/task_queue/BUILD.gn
index 333c872..f6bbbc3 100644
--- a/api/task_queue/BUILD.gn
+++ b/api/task_queue/BUILD.gn
@@ -42,8 +42,8 @@
   deps = [
     ":task_queue",
     "../../rtc_base:rtc_event",
-    "../../rtc_base:rtc_task_queue_api",
     "../../rtc_base:timeutils",
+    "../../rtc_base/task_utils:to_queued_task",
     "../../test:test_support",
     "//third_party/abseil-cpp/absl/memory",
     "//third_party/abseil-cpp/absl/strings",