Add the COM STA Task Runner

base/task_scheduler/scheduler_single_thread_task_runner_manager.h

Index: base/task_scheduler/scheduler_single_thread_task_runner_manager.h
diff --git a/base/task_scheduler/scheduler_single_thread_task_runner_manager.h b/base/task_scheduler/scheduler_single_thread_task_runner_manager.h
index 6fbad4bb1d0e7ef5a64a843a65c4118c48899b63..24d1a9a010b35661ee8235666652b16c5d0312a1 100644
--- a/base/task_scheduler/scheduler_single_thread_task_runner_manager.h
+++ b/base/task_scheduler/scheduler_single_thread_task_runner_manager.h
@@ -5,6 +5,7 @@
 #ifndef BASE_TASK_SCHEDULER_SCHEDULER_SINGLE_THREAD_TASK_RUNNER_MANAGER_H_
 #define BASE_TASK_SCHEDULER_SCHEDULER_SINGLE_THREAD_TASK_RUNNER_MANAGER_H_
 
+#include <memory>
 #include <vector>
 
 #include "base/atomicops.h"
@@ -15,6 +16,7 @@
 #include "base/task_scheduler/scheduler_lock.h"
 #include "base/task_scheduler/scheduler_worker_pool_params.h"
 #include "base/task_scheduler/task_scheduler.h"
+#include "build/build_config.h"
 
 namespace base {
 
@@ -27,6 +29,12 @@ class DelayedTaskManager;
 class SchedulerWorker;
 class TaskTracker;
 
+namespace {
+
+class SchedulerWorkerDelegate;

[fdoray, 2017/03/22 20:41:53]

Instead of exposing a class from the anonymous namespace, use
SchedulerWorker::Delegate for the return value of CreateSchedulerWorkerDelegate?

[robliao, 2017/03/22 20:48:30]

I was thinking about that, but then that meant including scheduler_worker.h here
to do that. Didn't seem worth it just for that but if there is a strong
preference, we can do that.

+
+}  // namespace
+
 class BASE_EXPORT SchedulerSingleThreadTaskRunnerManager final {
  public:
   SchedulerSingleThreadTaskRunnerManager(
@@ -40,11 +48,26 @@ class BASE_EXPORT SchedulerSingleThreadTaskRunnerManager final {
   scoped_refptr<SingleThreadTaskRunner> CreateSingleThreadTaskRunnerWithTraits(
       const TaskTraits& traits);
 
+#if defined(OS_WIN)
+  scoped_refptr<SingleThreadTaskRunner> CreateCOMSTATaskRunnerWithTraits(
+      const TaskTraits& traits);
+#endif  // defined(OS_WIN)
+
   void JoinForTesting();
 
  private:
   class SchedulerSingleThreadTaskRunner;
 
+  template <typename DelegateType>
+  scoped_refptr<SingleThreadTaskRunner>
+  CreateSingleThreadTaskRunnerWithDelegate(const TaskTraits& traits);
+
+  template <typename DelegateType>
+  std::unique_ptr<SchedulerWorkerDelegate> CreateSchedulerWorkerDelegate(
+      const SchedulerWorkerPoolParams& params,
+      int id);
+
+  template <typename DelegateType>
   SchedulerWorker* CreateAndRegisterSchedulerWorker(
       const SchedulerWorkerPoolParams& params);