Enable eslint indentation rule.

This is a fully automated change.  The linter will fail because the
extra indentation caused line-length errors.  These won't be fixed
automatically.  They are fixed in a follow-up to make this one fully
automated.

Change-Id: I4d8cf9c998985add2bcd24a81c8d65495668c4f3

test/dash/dash_parser_segment_list_unit.js

@@ -56,7 +56,7 @@ describe('DashParser SegmentList', () => {
       '</SegmentList>',
     ], 30 /* duration */);
     const references = [ManifestParser.makeReference('s1.mp4', 1,
-                                                   0, 30, baseUri)];
+        0, 30, baseUri)];
     await Dash.testSegmentIndex(source, references);
   });