Mandate unique_ptr for base::IDMap in IDMapOwnPointer mode.

content/shell/browser/layout_test/layout_test_permission_manager.cc

 // Copyright 2015 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 "content/shell/browser/layout_test/layout_test_permission_manager.h"
 
 #include <list>
+#include <memory>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/permission_type.h"
 #include "content/public/browser/web_contents.h"
 #include "content/shell/browser/layout_test/layout_test_content_browser_client.h"
 #include "content/shell/browser/layout_test/layout_test_notification_manager.h"
 
 namespace content {
@@ skipping 122 matching lines @@
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 }
 
 int LayoutTestPermissionManager::SubscribePermissionStatusChange(
     PermissionType permission,
     const GURL& requesting_origin,
     const GURL& embedding_origin,
     const base::Callback<void(blink::mojom::PermissionStatus)>& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
-  Subscription* subscription = new Subscription();
+  std::unique_ptr<Subscription> subscription = base::MakeUnique<Subscription>();

[danakj, 2016/11/18 00:15:34]

"auto subscription" .. if u want

   subscription->permission =
       PermissionDescription(permission, requesting_origin, embedding_origin);
   subscription->callback = callback;
   subscription->current_value =
       GetPermissionStatus(permission,
                           subscription->permission.origin,
                           subscription->permission.embedding_origin);
 
-  return subscriptions_.Add(subscription);
+  return subscriptions_.Add(std::move(subscription));
 }
 
 void LayoutTestPermissionManager::UnsubscribePermissionStatusChange(
     int subscription_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   // Whether |subscription_id| is known will be checked by the Remove() call.
   subscriptions_.Remove(subscription_id);
 }
 
@@ skipping 46 matching lines @@
     // Add the callback to |callbacks| which will be run after the loop to
     // prevent re-entrance issues.
     callbacks.push_back(base::Bind(subscription->callback, status));
   }
 
   for (const auto& callback : callbacks)
     callback.Run();
 }
 
 }  // namespace content