Not much to see here...
Created attachment 129543 [details]
Why do we need to include ValueCheck.h in AsyncFileStream.h?
Created attachment 129550 [details]
without unneeded changes
Attachment 129550 [details] did not pass style-queue:
Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'Source/WebCore/ChangeLog', u'Source/WebCor..." exit_code: 1
Source/WebCore/fileapi/FileStreamProxy.h:65: Should have only a single space after a punctuation in a comment. [whitespace/comments] 
Total errors found: 1 in 6 files
If any of these errors are false positives, please file a bug against check-webkit-style.