Remove unused variable orig_size.

Remove unused variable orig_size.

Original patch by Andrey Khalyavin <halyavin@google.com>;

BUG=N/A

[halyavin, 2014-07-12 19:35:03]

My editor removes trailing spaces automatically, hence the extra diff.

[Bo Xu, 2014-07-14 17:25:41]

On 2014/07/12 19:35:03, halyavin wrote:
> My editor removes trailing spaces automatically, hence the extra diff.

lgtm

[halyavin, 2014-07-16 16:28:15]

Can you commit it, please?

[Bo Xu, 2014-07-16 16:53:14]

On 2014/07/16 16:28:15, halyavin wrote:
> Can you commit it, please?

Sure. I can not edit the Description. Can you add your attribution like in this 
https://pdfium.googlesource.com/pdfium/+/def5c7d8af6ecb08da02c302f6c2600197d1....
Thanks

[halyavin, 2014-07-16 17:53:00]

Done. For some reason git-cl upload doesn't change description so I edited it
through web-interface. It adds superficial ; for some reason.

[Bo Xu, 2014-07-16 23:33:12]

On 2014/07/16 17:53:00, halyavin wrote:
> Done. For some reason git-cl upload doesn't change description so I edited it
> through web-interface. It adds superficial ; for some reason.

Thanks. Commit done.

[Bo Xu, 2014-07-18 02:19:30]

On 2014/07/16 23:33:12, Bo Xu wrote:
> On 2014/07/16 17:53:00, halyavin wrote:
> > Done. For some reason git-cl upload doesn't change description so I edited
it
> > through web-interface. It adds superficial ; for some reason.
> 
> Thanks. Commit done.

halyavin, I guess you have to manually close this issue.