Fix PPAPI TestCase so individual tests can be run more than once.

Fix PPAPI TestCase so individual tests can be run more than once.
When tests are run multiple times (e.g. to test callback types), only
the first invocation runs.

BUG=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=215776

[bbudge, 2013-08-03 00:53:53]

This can't be landed directly. It causes some new test configurations to run and
some of these are failing, e.g. FileIO.RequestOSFileHandleWithOpenExclusive.

[dmichael (off chromium), 2013-08-03 03:46:06]

Ugh, sorry, nice catch. This part lgtm... let me know when you have the fixes.
Or...  just disable those tests so you can get this in and stop the bleeding.

[bbudge, 2013-08-03 05:26:05]

On 2013/08/03 03:46:06, dmichael wrote:
> Ugh, sorry, nice catch. This part lgtm... let me know when you have the fixes.
> Or...  just disable those tests so you can get this in and stop the bleeding.

I ran the whole test suite and that is the only failing test. I'll see if it can
be fixed easily and if so, add it here.

[bbudge, 2013-08-05 20:59:14]

Move the Delete to before Open to make the test handle more bad cases.

[commit-bot: I haz the power, 2013-08-05 21:23:36]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/bbudge@chromium.org/21833005/18001

[commit-bot: I haz the power, 2013-08-06 03:07:15]

Change committed as 215776