Revert of Add remoting and PPAPI tests to GN build

Revert of Add remoting and PPAPI tests to GN build (patchset #6 id:100001 of https://codereview.chromium.org/961323004/)

Reason for revert:
broke windows GN builds as seen in

http://build.chromium.org/p/chromium.win/builders/Win8%20GN/builds/5206/steps/compile/logs/stdio

Original issue's description:
> Add remoting and PPAPI tests to GN build
>
> Reland of https://codereview.chromium.org/965633002/
>
> TBR=dpranke
>
> Committed: https://crrev.com/66c53eef76f7dff97b1bc76d51740c3a9c07844f
> Cr-Commit-Position: refs/heads/master@{#318756}

TBR=dpranke@chromium.org,brettw@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/defc80c0cd51186b467c3e59eabdbf54d25bde74
Cr-Commit-Position: refs/heads/master@{#318772}

[cpu_(ooo_6.6-7.5), 2015-03-02 22:25:01]

Created Revert of Add remoting and PPAPI tests to GN build

[commit-bot: I haz the power, 2015-03-02 22:26:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/968243004/1

[commit-bot: I haz the power, 2015-03-02 22:27:55]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-02 22:28:43]

Patchset 1 (id:??) landed as
https://crrev.com/defc80c0cd51186b467c3e59eabdbf54d25bde74
Cr-Commit-Position: refs/heads/master@{#318772}