Revert of Adding status to swap complete

Revert of Adding status to swap complete (patchset #18 id:340001 of https://codereview.chromium.org/1084173004/)

Reason for revert:
Looks like this broke compilation on http://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Ozone%20Builder/builds/17401.

Speculatively reverting for now. If confirmed, will file a bug with details, otherwise re-revert.

Cheers,
your sheriff

Original issue's description:
> Adding status to swap buffers completion
>
> This will give us more options than completing all swaps successfully, or losing context
>
> BUG=476966
> TBR=torne - approved interface change
>
> Committed: https://crrev.com/c794eda78e9ba3c46b550b433e9fe5a248d40104
> Cr-Commit-Position: refs/heads/master@{#331906}

TBR=alexst@chromium.org,danakj@chromium.org,dnicoara@chromium.org,nasko@chromium.org,piman@chromium.org,spang@chromium.org,torne@chromium.org,dcheng@chromium.org,achaulk@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=476966
Committed: https://crrev.com/9b3f11392a034ab4479126eede391e253c7c0969
Cr-Commit-Position: refs/heads/master@{#331939}

[vabr (Chromium), 2015-05-29 10:39:11]

Created Revert of Adding status to swap complete

[commit-bot: I haz the power, 2015-05-29 10:39:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1166463004/1

[commit-bot: I haz the power, 2015-05-29 10:40:48]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-29 10:41:37]

Patchset 1 (id:??) landed as
https://crrev.com/9b3f11392a034ab4479126eede391e253c7c0969
Cr-Commit-Position: refs/heads/master@{#331939}

[vabr (Chromium), 2015-05-29 11:00:51]

On 2015/05/29 10:41:37, commit-bot: I haz the power wrote:
> Patchset 1 (id:??) landed as
> https://crrev.com/9b3f11392a034ab4479126eede391e253c7c0969
> Cr-Commit-Position: refs/heads/master@{#331939}

More info in http://crbug.com/493649