/etc/java-7-openjdk/accessibility.properties is in openjdk-7-jre-headless 7u51-2.4.6-1ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | #
# The following line specifies the assistive technology classes
# that should be loaded into the Java VM when the AWT is initailized.
# Specify multiple classes by separating them with commas.
# Note: the line below cannot end the file (there must be at
# a minimum a blank line following it).
#
# Doesn't work, see LP: #935296
#assistive_technologies=org.GNOME.Accessibility.AtkWrapper
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