Jim Chen 99ba526941 Bug 1330257 - 1. Refactor SessionAccessibility; r=eeejay
Move the AccessibilityNodeProvider implementation under
SessionAccessibility, to reduce the indent of the code.

Also make all methods in SessionAccessibility.Settings static to make
the code easier to follow.

Differential Revision: https://phabricator.services.mozilla.com/D3250
2018-08-21 15:23:27 -04:00
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