Nuke WebPassOwnPtr<T> and replace it with std::unique_ptr<T>.

content/renderer/cache_storage/cache_storage_dispatcher.cc

Index: content/renderer/cache_storage/cache_storage_dispatcher.cc
diff --git a/content/renderer/cache_storage/cache_storage_dispatcher.cc b/content/renderer/cache_storage/cache_storage_dispatcher.cc
index dd5b25835d55c463ec5777b78644b590b0e22717..25b5f86762ead5cf012626eb40f84572c256c534 100644
--- a/content/renderer/cache_storage/cache_storage_dispatcher.cc
+++ b/content/renderer/cache_storage/cache_storage_dispatcher.cc
@@ -303,7 +303,7 @@ void CacheStorageDispatcher::OnCacheStorageOpenSuccess(int thread_id,
                       TimeTicks::Now() - open_times_[request_id]);
   WebServiceWorkerCacheStorage::CacheStorageWithCacheCallbacks* callbacks =
       open_callbacks_.Lookup(request_id);
-  callbacks->onSuccess(blink::adoptWebPtr(web_cache.release()));
+  callbacks->onSuccess(std::move(web_cache));
   open_callbacks_.Remove(request_id);
   open_times_.erase(request_id);
 }