Revert 275293 "Add authentication support to AttachmentUploaderI..."
BUG=381581
> Add authentication support to AttachmentUploaderImpl.
>
> Update AUI to request an access token and send an Authorization header
> with each requests. If the server responds with 401, AUI invalidates
> its token, but does not retry. Retries will be implemented in a future
> CL, probably at a higher level.
>
> BUG=371516
>
> Review URL: https://codereview.chromium.org/
304253010
TBR=maniscalco@chromium.org
Review URL: https://codereview.chromium.org/
316413002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@275357 0039d316-1c4b-4281-b951-d872f2087c98