Revert of Added MockPresentationClient to use in layout tests.

Revert of Added MockPresentationClient to use in layout tests. (patchset #1 id:1 of https://codereview.chromium.org/905823004/)

Reason for revert:
This is causing layout failures on the blink bots. They're crashing with the following assertion:

STDERR: [17800:1287:0207/062834:4514258387182:FATAL:mock_presentation_client.cc(34)] Check failed: controller_ != controller && (!controller || !controller_).

Original issue's description:
> Added MockPresentationClient to use in layout tests.
>
> Blink change with the test follows: https://codereview.chromium.org/906673002/
>
> BUG=412331
>
> Committed: https://crrev.com/49a225f6ecb52b805a99d55e9e37ed7e21ef7c1b
> Cr-Commit-Position: refs/heads/master@{#315204}

TBR=mkwst@chromium.org,peter@chromium.org,avayvod@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=412331
Committed: https://crrev.com/2b69cdc15e729f5566cf51d81a155607ff6e95f1
Cr-Commit-Position: refs/heads/master@{#315208}

[dsinclair, 2015-02-07 14:44:27]

Created Revert of Added MockPresentationClient to use in layout tests.

[commit-bot: I haz the power, 2015-02-07 14:45:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/906753002/1

[commit-bot: I haz the power, 2015-02-07 14:45:51]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-07 14:46:39]

Patchset 1 (id:??) landed as
https://crrev.com/2b69cdc15e729f5566cf51d81a155607ff6e95f1
Cr-Commit-Position: refs/heads/master@{#315208}

[dsinclair, 2015-02-07 14:47:07]

On 2015/02/07 at 14:45:28, commit-bot wrote:
> CQ is trying da patch. Follow status at
>  https://chromium-cq-status.appspot.com/patch-status/906753002/1


I saw the crashes on mac_blink_rel, linux_blink_rel and linux_blink_dbg before
reverting. An example run is:
http://build.chromium.org/p/tryserver.blink/builders/mac_blink_rel/builds/41892