Motown: Move framework/util/incident* so other services can use it

services/media/framework/util/incident.cc

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "services/media/framework/util/incident.h"
-
-namespace mojo {
-namespace media {
-
-Incident::Incident() {}
-
-Incident::~Incident() {}
-
-void Incident::Occur() {
-  if (occurred_) {
-    return;
-  }
-
-  occurred_ = true;
-
-  // Swap out consequences_ in case one of the callbacks deletes this.
-  std::vector<std::function<void()>> consequences;
-  consequences_.swap(consequences);
-
-  for (const std::function<void()>& consequence : consequences) {
-    consequence();
-  }
-}
-
-ThreadsafeIncident::ThreadsafeIncident() {}
-
-ThreadsafeIncident::~ThreadsafeIncident() {}
-
-void ThreadsafeIncident::Occur() {
-  std::vector<std::function<void()>> consequences;
-
-  {
-    base::AutoLock lock(consequences_lock_);
-
-    if (occurred_) {
-      return;
-    }
-
-    occurred_ = true;
-    consequences_.swap(consequences);
-  }
-
-  for (const std::function<void()>& consequence : consequences) {
-    consequence();
-  }
-}
-
-}  // namespace media
-}  // namespace mojo