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This requires another annotation:
  "always_set_output_parameters"

This annotation ensures that the thunk implementation will zero-out the value of all output parameters on failure.

Tested:
  Built chrome and browser_tests.

BUG=

Review URL: https://codereview.chromium.org/14007010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@194613 0039d316-1c4b-4281-b951-d872f2087c98