Use base::PostTaskAndReplyWithResults() in more places.

content/public/browser/browser_thread.h

Index: content/public/browser/browser_thread.h
diff --git a/content/public/browser/browser_thread.h b/content/public/browser/browser_thread.h
index ab44edab4982757ad861a624b79a7cf68b67f55f..55cb62b22355d339822414f06874d2bd2695590f 100644
--- a/content/public/browser/browser_thread.h
+++ b/content/public/browser/browser_thread.h
@@ -163,6 +163,10 @@ class CONTENT_EXPORT BrowserThread {
   // lookup and is guaranteed unique without you having to come up with a
   // unique string), you can access the sequenced worker pool directly via
   // GetBlockingPool().
+  //
+  // If you need to PostTaskAndReplyWithResult, use
+  // base::PostTaskAndReplyWithResult() with GetBlockingPool() as the task
+  // runner.
   static bool PostBlockingPoolTask(const tracked_objects::Location& from_here,
                                    const base::Closure& task);
   static bool PostBlockingPoolTaskAndReply(