Replace Closure in TaskRunner::PostTask with OneShotCallback

ios/web/public/web_thread.h

Index: ios/web/public/web_thread.h
diff --git a/ios/web/public/web_thread.h b/ios/web/public/web_thread.h
index 7f7c4149b08f982eb78ddf40189e9437c352421a..08f790621daaf61b18eaf4cae663e7b2372d3202 100644
--- a/ios/web/public/web_thread.h
+++ b/ios/web/public/web_thread.h
@@ -98,24 +98,24 @@ class WebThread {
   // They return true iff the thread existed and the task was posted.
   static bool PostTask(ID identifier,
                        const tracked_objects::Location& from_here,
-                       const base::Closure& task);
+                       base::OnceClosure task);
   static bool PostDelayedTask(ID identifier,
                               const tracked_objects::Location& from_here,
-                              const base::Closure& task,
+                              base::OnceClosure task,
                               base::TimeDelta delay);
   static bool PostNonNestableTask(ID identifier,
                                   const tracked_objects::Location& from_here,
-                                  const base::Closure& task);
+                                  base::OnceClosure task);
   static bool PostNonNestableDelayedTask(
       ID identifier,
       const tracked_objects::Location& from_here,
-      const base::Closure& task,
+      base::OnceClosure task,
       base::TimeDelta delay);
 
   static bool PostTaskAndReply(ID identifier,
                                const tracked_objects::Location& from_here,
-                               const base::Closure& task,
-                               const base::Closure& reply);
+                               base::OnceClosure task,
+                               base::OnceClosure reply);
 
   template <typename ReturnType, typename ReplyArgType>
   static bool PostTaskAndReplyWithResult(
@@ -158,15 +158,15 @@ class WebThread {
   // base::PostTaskAndReplyWithResult() with GetBlockingPool() as the task
   // runner.
   static bool PostBlockingPoolTask(const tracked_objects::Location& from_here,
-                                   const base::Closure& task);
+                                   base::OnceClosure task);
   static bool PostBlockingPoolTaskAndReply(
       const tracked_objects::Location& from_here,
-      const base::Closure& task,
-      const base::Closure& reply);
+      base::OnceClosure task,
+      base::OnceClosure reply);
   static bool PostBlockingPoolSequencedTask(
       const std::string& sequence_token_name,
       const tracked_objects::Location& from_here,
-      const base::Closure& task);
+      base::OnceClosure task);
 
   // Returns the thread pool used for blocking file I/O. Use this object to
   // perform random blocking operations such as file writes.