devtools_closure_compile failing on chromium.linux/Linux Tests

Type: build-failure

Builders failed on: 
- Linux Tests: 
  https://build.chromium.org/p/chromium.linux/builders/Linux%20Tests


Reverting this CL:
https://codereview.chromium.org/2656683003/

It passed CQ because this CL was also in CQ https://codereview.chromium.org/2605693003

The combination of these two broke our closure compilation.