Migrate MessageLoop::ScopedNestableTaskAllower to...

Migrate MessageLoop::ScopedNestableTaskAllower to RunLoop::Type::kNestableTasksAllowed in /content/browser/service_worker

This pass focuses on ML::SNTA in same scope as an anonymous RunLoop().RunUntilIdle()
Scripted via a small tweak of https://bugs.chromium.org/p/chromium/issues/detail?id=781352#c1
which focused on RunLoops with a variable name.

The script should have replaced a MessageLoop::ScopedNestableTaskAllower
in the same scope as a RunLoop with a RunLoop of
Type::kNestableTasksAllowed. If there was a comment above the
MessageLoop::ScopedNestableTaskAllower, it should have been moved
alongside the augmented RunLoop.

Includes should have been stripped if the was the last usage of message_loop.h
in that file.

Please CQ if LGTY

This CL was uploaded by git cl split.

R=nhiroki@chromium.org

Bug: 781352
Change-Id: Ia1793866f9ebdf502732dcd49861bf3b80c29894
Reviewed-on: https://chromium-review.googlesource.com/995973
Commit-Queue: Hiroki Nakagawa <nhiroki@chromium.org>
Reviewed-by: Hiroki Nakagawa <nhiroki@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548622}

content/browser/service_worker/service_worker_job_unittest.cc

@@ -8,7 +8,6 @@
 #include "base/files/scoped_temp_dir.h"
 #include "base/logging.h"
 #include "base/macros.h"
-#include "base/message_loop/message_loop.h"
 #include "base/optional.h"
 #include "base/run_loop.h"
 #include "base/test/test_simple_task_runner.h"
@@ -832,9 +831,7 @@ const std::string kScope("scope/");
 const std::string kScript("script.js");
 
 void RunNestedUntilIdle() {
-  base::MessageLoop::ScopedNestableTaskAllower allow(
-      base::MessageLoop::current());
-  base::RunLoop().RunUntilIdle();
+  base::RunLoop(base::RunLoop::Type::kNestableTasksAllowed).RunUntilIdle();
 }
 
 void OnIOComplete(int* rv_out, int rv) {