Remove rtc::QueuedTask alias, use webrtc::QueuedTask directly

Use absl::WrapUnique/absl::make_unique to create the queued tasks.

Bug: webrtc:10191
Change-Id: I8f47a60cb326b0fc361c7f0e338b25373d39937c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/126525
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27063}
diff --git a/rtc_base/task_queue.cc b/rtc_base/task_queue.cc
index d11b34e..46ab495 100644
--- a/rtc_base/task_queue.cc
+++ b/rtc_base/task_queue.cc
@@ -34,11 +34,11 @@
   return impl_->IsCurrent();
 }
 
-void TaskQueue::PostTask(std::unique_ptr<QueuedTask> task) {
+void TaskQueue::PostTask(std::unique_ptr<webrtc::QueuedTask> task) {
   return impl_->PostTask(std::move(task));
 }
 
-void TaskQueue::PostDelayedTask(std::unique_ptr<QueuedTask> task,
+void TaskQueue::PostDelayedTask(std::unique_ptr<webrtc::QueuedTask> task,
                                 uint32_t milliseconds) {
   return impl_->PostDelayedTask(std::move(task), milliseconds);
 }