[Nearby] Remove surprising use of unique_ptr for CorePayload.

Discovered while debugging crbug.com/2393616.

The code in question moves the wrapped CorePayload of a
std::unique_ptr<CorePayload>, instead of moving the entire smart
pointer. Resolved by simply not using std::unique_ptr in the first
place.

Also fix a minor typo discovered while debugging.

Bug: 2393616
Change-Id: I518230bd2ced6735d13f4fc8fbee54758ceec1e5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2398952
Commit-Queue: Ryan Hansberry <hansberry@chromium.org>
Reviewed-by: James Vecore <vecore@google.com>
Cr-Commit-Position: refs/heads/master@{#805154}

chrome/browser/nearby_sharing/nearby_connections_manager_impl.cc

@@ -468,7 +468,7 @@ void NearbyConnectionsManagerImpl::OnConnectionInitiated(
           [](const std::string& endpoint_id, ConnectionsStatus status) {
             NS_LOG(VERBOSE)
                 << __func__ << ": Accept connection attempted to endpoint "
-                << endpoint_id << "over Nearby Connections with result: "
+                << endpoint_id << " over Nearby Connections with result: "
                 << ConnectionsStatusToString(status);
           },
           endpoint_id));

chrome/services/sharing/nearby/nearby_connections.cc

@@ -362,12 +362,12 @@ void NearbyConnections::SendPayload(
     const std::vector<std::string>& endpoint_ids,
     mojom::PayloadPtr payload,
     SendPayloadCallback callback) {
-  std::unique_ptr<Payload> core_payload;
+  Payload core_payload;
   switch (payload->content->which()) {
     case mojom::PayloadContent::Tag::BYTES:
-      core_payload = std::make_unique<Payload>(
-          payload->id,
-          ByteArrayFromMojom(payload->content->get_bytes()->bytes));
+      core_payload =
+          Payload(payload->id,
+                  ByteArrayFromMojom(payload->content->get_bytes()->bytes));
       break;
     case mojom::PayloadContent::Tag::FILE:
       int64_t file_size = payload->content->get_file()->file.GetLength();
@@ -376,12 +376,11 @@ void NearbyConnections::SendPayload(
         input_file_map_.insert_or_assign(
             payload->id, std::move(payload->content->get_file()->file));
       }
-      core_payload = std::make_unique<Payload>(
-          payload->id, InputFile(payload->id, file_size));
+      core_payload = Payload(payload->id, InputFile(payload->id, file_size));
       break;
   }
 
-  core_->SendPayload(absl::MakeSpan(endpoint_ids), std::move(*core_payload),
+  core_->SendPayload(absl::MakeSpan(endpoint_ids), std::move(core_payload),
                      ResultCallbackFromMojom(std::move(callback)));
 }