Pass Callback to TaskRunner by value and consume it on invocation (1)

ios/web/web_thread_impl.h

Index: ios/web/web_thread_impl.h
diff --git a/ios/web/web_thread_impl.h b/ios/web/web_thread_impl.h
index adc59cd8dea4cb392bfc53cf6dfcceabb3eff576..1341d63bd48066b7c0dd6ed31653f2f3224a7bdd 100644
--- a/ios/web/web_thread_impl.h
+++ b/ios/web/web_thread_impl.h
@@ -5,6 +5,7 @@
 #ifndef IOS_WEB_WEB_THREAD_IMPL_H_
 #define IOS_WEB_WEB_THREAD_IMPL_H_
 
+#include "base/callback.h"
 #include "base/threading/thread.h"
 #include "ios/web/public/web_thread.h"
 
@@ -48,7 +49,7 @@ class WebThreadImpl : public WebThread, public base::Thread {
 
   static bool PostTaskHelper(WebThread::ID identifier,
                              const tracked_objects::Location& from_here,
-                             const base::Closure& task,
+                             base::Closure task,
                              base::TimeDelta delay,
                              bool nestable);