Replace base/task/ temporary forward headers with their final locations

Note to QA: This merely changes includes and should not be blamed
for files it touched.

Bug: 1255932
Change-Id: I1ce4e31efd5792ebf2080812e665cae838a54972
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3226943
Reviewed-by: Gabriel Charette <[email protected]>
Owners-Override: Gabriel Charette <[email protected]>
Cr-Commit-Position: refs/heads/main@{#932153}
diff --git a/dbus/object_manager_unittest.cc b/dbus/object_manager_unittest.cc
index b4ec9ef..cd691a7e 100644
--- a/dbus/object_manager_unittest.cc
+++ b/dbus/object_manager_unittest.cc
@@ -14,7 +14,7 @@
 #include "base/bind.h"
 #include "base/message_loop/message_pump_type.h"
 #include "base/run_loop.h"
-#include "base/task/single_thread_task_runner_forward.h"
+#include "base/task/single_thread_task_runner.h"
 #include "base/test/task_environment.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"