Revert of Add a dummy variable to ResourceMsg_DataReceived.

Revert of Add a dummy variable to ResourceMsg_DataReceived. (patchset #4 id:60001 of https://codereview.chromium.org/1346923008/ )

Reason for revert:
This CL was only intended to be a part of one canary release.

Original issue's description:
> content: Add a dummy variable to ResourceMsg_DataReceived.
>
> I suspect that this will expose a crash for a small number of Windows canary
> users. This CL is only intended to be landed for one day.
>
> BUG=527588
>
> Committed: https://crrev.com/a59c6e37a4cc9f01ab0a8fffc79004875a8b0617
> Cr-Commit-Position: refs/heads/master@{#349830}

TBR=avi@chromium.org,tsepez@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=527588
Committed: https://crrev.com/9064a2524f743be9eaafd39c442fa2391f657a92
Cr-Commit-Position: refs/heads/master@{#349881}

[erikchen, 2015-09-20 22:29:10]

Created Revert of Add a dummy variable to ResourceMsg_DataReceived.

[commit-bot: I haz the power, 2015-09-20 22:29:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1347373003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1347373003/1

[commit-bot: I haz the power, 2015-09-20 22:30:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-20 22:30:55]

Patchset 1 (id:??) landed as
https://crrev.com/9064a2524f743be9eaafd39c442fa2391f657a92
Cr-Commit-Position: refs/heads/master@{#349881}