MD5: Remove unnecessary temporary 'inbuf' variable.

MD5: Remove unnecessary temporary 'inbuf' variable.

It does not seem necessary to have this variable, just to create another
down below called 'buf'.

BUG=None
TEST=base_unittests --gtest_filter=MD5*
R=thestig@chromium.org

Committed: https://crrev.com/0dd3462e047faa4dc4a5e5ac1fc5f58ca589a489
Cr-Commit-Position: refs/heads/master@{#325473}

[Lei Zhang, 2015-04-16 08:22:44]

The CQ bit was checked by thestig@chromium.org

[Lei Zhang, 2015-04-16 08:22:44]

lgtm

[commit-bot: I haz the power, 2015-04-16 08:23:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1087333004/1

[commit-bot: I haz the power, 2015-04-16 11:08:05]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-04-16 11:08:05]

Try jobs failed on following builders:
  win_chromium_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[tfarina, 2015-04-16 12:22:51]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2015-04-16 12:23:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1087333004/1

[commit-bot: I haz the power, 2015-04-16 14:19:52]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-04-16 14:19:53]

Try jobs failed on following builders:
  win_chromium_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[tfarina, 2015-04-16 15:25:45]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2015-04-16 15:25:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1087333004/1

[tfarina, 2015-04-16 16:20:11]

The CQ bit was checked by tfarina@chromium.org

[tfarina, 2015-04-16 16:20:11]

The patchset sent to the CQ was uploaded after l-g-t-m from thestig@chromium.org
Link to the patchset: https://codereview.chromium.org/1087333004/#ps20001
(title: "REBASE")

[commit-bot: I haz the power, 2015-04-16 16:20:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1087333004/20001

[commit-bot: I haz the power, 2015-04-16 17:50:54]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-04-16 17:51:53]

Patchset 2 (id:??) landed as
https://crrev.com/0dd3462e047faa4dc4a5e5ac1fc5f58ca589a489
Cr-Commit-Position: refs/heads/master@{#325473}