Remove guava dependency for multiple_proguards test.

Remove guava dependency for multiple_proguards test.

The multiple_proguards_test_apk target used guava as an example for
something that needed to be proguarded out to ensure no proguard
warnings.

Since guava is going away, this CL moves the bad code into chromium
directly so there is no need for guava.

It does bad things which produce warnings, so they are silenced by
telling GYP that it is not chromium code.

BUG=412673
Committed: https://crrev.com/1c8fb8003d7d8e338c0bd277d3ab6bdff97e75df
Cr-Commit-Position: refs/heads/master@{#294950}

[nyquist, 2014-09-15 21:37:59]

nyquist@chromium.org changed reviewers:
+ cjhopman@chromium.org

[nyquist, 2014-09-15 21:38:00]

cjhopman: PTAL

[cjhopman, 2014-09-15 21:53:56]

lgtm

[nyquist, 2014-09-15 22:43:53]

The CQ bit was checked by nyquist@chromium.org

[commit-bot: I haz the power, 2014-09-15 22:56:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/571203003/1

[commit-bot: I haz the power, 2014-09-16 00:54:14]

Committed patchset #1 (id:1) as eb9de007e7f5daf130fc8745f15ca20516a434f8

[commit-bot: I haz the power, 2014-09-16 00:56:08]

Patchset 1 (id:??) landed as
https://crrev.com/1c8fb8003d7d8e338c0bd277d3ab6bdff97e75df
Cr-Commit-Position: refs/heads/master@{#294950}