Revert of Stub for web-base client for DevTools bridge and tests

Revert of Stub for web-base client for DevTools bridge and tests (patchset #5 id:100001 of https://codereview.chromium.org/736363002/)

Reason for revert:
Reverting since now DevToolsBridgeClient (https://code.google.com/p/chromium/codesearch#chromium/src/chrome/browser/devtools/device/webrtc/devtools_bridge_client.h) is that WebClient supposed to be. All further code will be placed there.

Original issue's description:
> Stub for web-base client for DevTools bridge and tests
>
> This patch mostly consists of testing environment for web WebClient. While
> WebClient intended to be base for a new DeviceProvider in DevTools frontend
> (https://codereview.chromium.org/720133002/) it is convinient to run
> tests on android. It lets to test the client directly against server
> counterpart avoiding flakiness of network and cloud services.
>
> TBR=jochen@chromium.org
> BUG=383418
>
> Committed: https://crrev.com/ff7a801dfddaa22643accaf3e0df192470fb7a7b
> Cr-Commit-Position: refs/heads/master@{#305131}

TBR=mnaganov@chromium.org,dgozman@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=383418
Committed: https://crrev.com/e4584d5cb7327be5e2d76752855757a9e0c2785e
Cr-Commit-Position: refs/heads/master@{#308329}

[SeRya, 2014-12-15 09:32:25]

Created Revert of Stub for web-base client for DevTools bridge and tests

[SeRya, 2014-12-15 09:32:58]

The CQ bit was unchecked by serya@chromium.org

[commit-bot: I haz the power, 2014-12-15 09:32:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/802293002/1

[commit-bot: I haz the power, 2014-12-15 09:33:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-15 09:34:27]

Patchset 1 (id:??) landed as
https://crrev.com/e4584d5cb7327be5e2d76752855757a9e0c2785e
Cr-Commit-Position: refs/heads/master@{#308329}