Revert of media: Add ProvisionFetcher mojo interface and implementation.

Revert of media: Add ProvisionFetcher mojo interface and implementation. (patchset #6 id:100001 of https://codereview.chromium.org/1466633002/ )

Reason for revert:
Breaks GN Android compilation with error:

In file included from ../../content/browser/media/android/provision_fetcher_impl.cc:5:
../../content/browser/media/android/provision_fetcher_impl.h:13:10: fatal error: 'media/mojo/interfaces/provision_fetcher.mojom.h' file not found
#include "media/mojo/interfaces/provision_fetcher.mojom.h"

CC=lizeb,tedchoc,xhwang

Original issue's description:
> media: Add ProvisionFetcher mojo interface and implementation.
>
> Add a mojo servive to do provisioning for MediaDrm in a non-browser process.
>
> BUG=546107
> TEST=Tested running MediaDrmBridge in the GPU process and performing
> provisioning in the Browser process through this mojo service.
>
> Committed: https://crrev.com/ee71a525527d3ae607bb4f0d7a747014d310ecae
> Cr-Commit-Position: refs/heads/master@{#361521}

TBR=rockot@chromium.org,jam@chromium.org,timav@chromium.org,xhwang@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=546107
Committed: https://crrev.com/5b151bf5cae08c5bb81f68673226cd113c0a237b
Cr-Commit-Position: refs/heads/master@{#361578}

[dominickn, 2015-11-25 05:01:09]

Created Revert of media: Add ProvisionFetcher mojo interface and implementation.

[commit-bot: I haz the power, 2015-11-25 05:02:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1473233005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1473233005/1

[commit-bot: I haz the power, 2015-11-25 05:03:55]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-25 05:06:00]

Patchset 1 (id:??) landed as
https://crrev.com/5b151bf5cae08c5bb81f68673226cd113c0a237b
Cr-Commit-Position: refs/heads/master@{#361578}