Revert of DevTools: protocol setting files properly handles mimetypes and directories.

Revert of DevTools: protocol setting files properly handles mimetypes and directories. (patchset #4 id:60001 of https://codereview.chromium.org/2098703003/ )

Reason for revert:
Failed https://uberchromegw.corp.google.com/i/official.desktop.continuous/builders/win%20trunk/builds/38159

Original issue's description:
> DevTools: protocol setting files properly handles mimetypes and directories.
> 
> BUG=620367
> 
> Committed: https://crrev.com/7377ed7748106955dadd95ab254ddd86ae411c16
> Cr-Commit-Position: refs/heads/master@{#403524}

TBR=tkent@chromium.org,dgozman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=620367

[einbinder, 2016-07-01 22:19:39]

The CQ bit was checked by einbinder@chromium.org

[einbinder, 2016-07-01 22:19:40]

Created Revert of DevTools: protocol setting files properly handles mimetypes
and directories.

[commit-bot: I haz the power, 2016-07-01 22:19:58]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-01 22:19:59]

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

[commit-bot: I haz the power, 2016-07-01 22:20:00]

No L-G-T-M from a valid reviewer yet. 
CQ run can only be started by full committers or once the patch has
received an L-G-T-M from a full committer.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[lushnikov, 2016-07-01 22:22:08]

lushnikov@chromium.org changed reviewers:
+ lushnikov@chromium.org

[lushnikov, 2016-07-01 22:22:09]

rs lgtm