/usr/share/doc/libclosure-compiler-java/api/com/google/javascript/rhino/testing/ is in libclosure-compiler-java-doc 20130227+dfsg1-8.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libclosure-compiler-java/api/com/google/javascript/rhino/testing/AbstractStaticScope.html
/usr/share/doc/libclosure-compiler-java/api/com/google/javascript/rhino/testing/Asserts.html
/usr/share/doc/libclosure-compiler-java/api/com/google/javascript/rhino/testing/BaseJSTypeTestCase.html
/usr/share/doc/libclosure-compiler-java/api/com/google/javascript/rhino/testing/MapBasedScope.html
/usr/share/doc/libclosure-compiler-java/api/com/google/javascript/rhino/testing/TestErrorReporter.html
/usr/share/doc/libclosure-compiler-java/api/com/google/javascript/rhino/testing/package-frame.html
/usr/share/doc/libclosure-compiler-java/api/com/google/javascript/rhino/testing/package-summary.html
/usr/share/doc/libclosure-compiler-java/api/com/google/javascript/rhino/testing/package-tree.html