scheduler: Add a base directory

components/scheduler/BUILD.gn

Index: components/scheduler/BUILD.gn
diff --git a/components/scheduler/BUILD.gn b/components/scheduler/BUILD.gn
index 26d4ab3ca33ede44a32a0b9c1b28f421bf3ec9d9..2795fdbfcfd22f29fb180c8d236d522a1efeb1b2 100644
--- a/components/scheduler/BUILD.gn
+++ b/components/scheduler/BUILD.gn
@@ -31,18 +31,20 @@ source_set("unit_tests") {
   testonly = true
 
   sources = [
+    "base/nestable_task_runner_for_test.cc",
+    "base/nestable_task_runner_for_test.h",
+    "base/task_queue_manager_unittest.cc",
+    "base/task_queue_selector_unittest.cc",
+    "base/task_queue_sets_unittest.cc",
+    "base/test_always_fail_time_source.cc",
+    "base/test_always_fail_time_source.h",
+    "base/test_time_source.cc",
+    "base/test_time_source.h",
     "child/idle_helper_unittest.cc",
-    "child/nestable_task_runner_for_test.cc",
-    "child/nestable_task_runner_for_test.h",
     "child/scheduler_helper_unittest.cc",
     "child/scheduler_task_runner_delegate_for_test.cc",
     "child/scheduler_task_runner_delegate_for_test.h",
     "child/scheduler_task_runner_delegate_impl_unittest.cc",
-    "child/task_queue_manager_unittest.cc",
-    "child/task_queue_selector_unittest.cc",
-    "child/task_queue_sets_unittest.cc",
-    "child/test_time_source.cc",
-    "child/test_time_source.h",
     "child/webthread_impl_for_worker_scheduler_unittest.cc",
     "child/worker_scheduler_impl_unittest.cc",
     "renderer/deadline_task_runner_unittest.cc",
@@ -50,8 +52,6 @@ source_set("unit_tests") {
     "renderer/task_cost_estimator_unittest.cc",
     "renderer/user_model_unittest.cc",
     "renderer/webthread_impl_for_renderer_scheduler_unittest.cc",
-    "test/test_always_fail_time_source.cc",
-    "test/test_always_fail_time_source.h",
   ]
 
   deps = [