Revert of Turn components/crash into a layered component.

Revert of Turn components/crash into a layered component. (patchset #6 id:100001 of https://codereview.chromium.org/1315303004/ )

Reason for revert:
This breaks Webkit layout tests.

Original issue's description:
> Turn components/crash into a layered component.
>
> The crash component cannot be used on iOS (as it depends on //content).
> Turn it into a layered component so that it is possible to put shared
> code related to crash there (components/crash_keys and objc_zombie.{h,mm}).
>
> BUG=522955
> TBR=sky@chromium.org
> TBR=jschuh@chromium.org
> NOPRESUBMIT=true
>
> Committed: https://crrev.com/4e483c64be5136b785e92c5baa971baca7eea2bc
> Cr-Commit-Position: refs/heads/master@{#349384}

TBR=blundell@chromium.org,jam@chromium.org,jschuh@chromium.org,mark@chromium.org,rsesek@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=522955
Committed: https://crrev.com/d7978868d7ebb7e8f671442f9515d947fab3e9ed
Cr-Commit-Position: refs/heads/master@{#349417}

[sdefresne, 2015-09-17 14:24:38]

Created Revert of Turn components/crash into a layered component.

[commit-bot: I haz the power, 2015-09-17 14:24:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1351923002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1351923002/1

[commit-bot: I haz the power, 2015-09-17 14:26:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-17 14:28:59]

Patchset 1 (id:??) landed as
https://crrev.com/d7978868d7ebb7e8f671442f9515d947fab3e9ed
Cr-Commit-Position: refs/heads/master@{#349417}