MeterRole was missed in computeAccessibilityIgnored()
MeterRole was missed in computeAccessibilityIgnored()

In this CL https://codereview.chromium.org/652663003/ MeterRole is not added to
computeAccessibilityIgnored().
So, adding that change in this CL.

BUG=421376

Review URL: https://codereview.chromium.org/653283003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@183778 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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