Fix use-after-move in blink/renderer/platform/video_capture/

Fix use-after-move (potential) bugs found by the
"bugprone-use-after-move" clang-tidy check.

Bug: 1122844
Change-Id: I4c9c15c156284df3eedeb8f3de964df24c10aca1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2431667Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Maksim Ivanov <emaxx@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810978}

third_party/blink/renderer/platform/video_capture/video_capture_impl.cc

@@ -185,9 +185,8 @@ struct VideoCaptureImpl::BufferContext
                                     const gpu::SyncToken& release_sync_token) {
     if (!buffer_context->media_task_runner_->BelongsToCurrentThread()) {
       buffer_context->media_task_runner_->PostTask(
-          FROM_HERE,
-          base::BindOnce(&BufferContext::MailboxHolderReleased,
-                         std::move(buffer_context), release_sync_token));
+          FROM_HERE, base::BindOnce(&BufferContext::MailboxHolderReleased,
+                                    buffer_context, release_sync_token));
       return;
     }
     buffer_context->gmb_resources_->release_sync_token = release_sync_token;