[Mac] Add missing interface needed to land WebKit side of crbug.com/72727
[Mac] Add missing interface needed to land WebKit side of crbug.com/72727

Update PPAPI sandbox interface so we can land the WebKit side of this bug.

The interface was updated as part of r87282 .

BUG=72727
TEST=No way to test
TBR=vtl


Review URL: http://codereview.chromium.org/7564005

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@95228 0039d316-1c4b-4281-b951-d872f2087c98

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