Document TaskRunners/TaskTraits/FROM_HERE as implicitly included from post_task.h

base/task_scheduler/post_task.h

Index: base/task_scheduler/post_task.h
diff --git a/base/task_scheduler/post_task.h b/base/task_scheduler/post_task.h
index 70aebd51c402ac15ee132d75fc8d886d2dfe1f49..711693710f9597ff45e025d95521952e5c14cc48 100644
--- a/base/task_scheduler/post_task.h
+++ b/base/task_scheduler/post_task.h
@@ -14,6 +14,10 @@
 #include "base/task_runner.h"
 #include "base/task_scheduler/task_traits.h"
 
+// To avoid redundant includes: users may omit including the following headers
+// if they are using their provided data types solely in direct interactions
+// with this API: location.h, task_traits.h, and *task_runner.h.

[robliao, 2016/11/02 20:13:55]

Is the asterisk in task_runner.h intentional?

[gab, 2016/11/02 20:25:21]

Yes, it applies to all 3 TaskRunner headers.

[danakj, 2016/11/02 22:58:01]

I think this comment is overprescribing things, just use the right includes and
let users do as they will.

+
 namespace base {
 
 // This is the preferred interface to post tasks to the TaskScheduler.