Revert of Resubmit of imageWriterPrivate.destroyPartitions.

Revert of https://codereview.chromium.org/115973007/
Reason for revert: Triggered Valgrind errors again.

TBR=asargent@chromium.org,tbarzic@chromium.org,stephenlin@chromium.org,nickam@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=328246
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=243215

[Drew Haven, 2014-01-07 00:46:47]

Created Revert of Resubmit of imageWriterPrivate.destroyPartitions.

[commit-bot: I haz the power, 2014-01-07 00:48:42]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a lowly provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[commit-bot: I haz the power, 2014-01-07 00:50:35]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a lowly provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[Lei Zhang, 2014-01-07 00:52:33]

lgtm stamp

[commit-bot: I haz the power, 2014-01-07 00:54:33]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/haven@chromium.org/125273006/1

[commit-bot: I haz the power, 2014-01-07 00:56:38]

Change committed as 243215