/usr/share/eclipse/dropins/ is in eclipse-mylyn-tasks-trac 3.11.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/eclipse/dropins/mylyn-tasks-trac/
/usr/share/eclipse/dropins/mylyn-tasks-trac/eclipse/
/usr/share/eclipse/dropins/mylyn-tasks-trac/eclipse/features/
/usr/share/eclipse/dropins/mylyn-tasks-trac/eclipse/features/org.eclipse.mylyn.trac_feature_3.11.0.201404031852//
/usr/share/eclipse/dropins/mylyn-tasks-trac/eclipse/features/org.eclipse.mylyn.trac_feature_3.11.0.201404031852/epl-v10.html
/usr/share/eclipse/dropins/mylyn-tasks-trac/eclipse/features/org.eclipse.mylyn.trac_feature_3.11.0.201404031852/feature.properties
/usr/share/eclipse/dropins/mylyn-tasks-trac/eclipse/features/org.eclipse.mylyn.trac_feature_3.11.0.201404031852/feature.xml
/usr/share/eclipse/dropins/mylyn-tasks-trac/eclipse/features/org.eclipse.mylyn.trac_feature_3.11.0.201404031852/license.html
/usr/share/eclipse/dropins/mylyn-tasks-trac/eclipse/plugins/
/usr/share/eclipse/dropins/mylyn-tasks-trac/eclipse/plugins/com.google.gson_2.2.4.jar
/usr/share/eclipse/dropins/mylyn-tasks-trac/eclipse/plugins/org.eclipse.mylyn.trac.core_3.11.0.201404031852.jar
/usr/share/eclipse/dropins/mylyn-tasks-trac/eclipse/plugins/org.eclipse.mylyn.trac.ui_3.11.0.201404031852.jar