Move SchedulerWorkerPoolParams to the base Namespace

base/task_scheduler/task_scheduler_impl.h

Index: base/task_scheduler/task_scheduler_impl.h
diff --git a/base/task_scheduler/task_scheduler_impl.h b/base/task_scheduler/task_scheduler_impl.h
index 9efd6d769b0a7dbbedb5e579fad29a438cedc0c5..deb2b9fbbd20274277b8598e0c2d9b1e69449a52 100644
--- a/base/task_scheduler/task_scheduler_impl.h
+++ b/base/task_scheduler/task_scheduler_impl.h
@@ -27,10 +27,12 @@
 #include "base/threading/thread.h"
 
 namespace base {
+
+class SchedulerWorkerPoolParams;
+
 namespace internal {
 
 class SchedulerServiceThread;
-class SchedulerWorkerPoolParams;
 
 // Default TaskScheduler implementation. This class is thread-safe.
 class BASE_EXPORT TaskSchedulerImpl : public TaskScheduler {