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This CL relands the conversion which failed due to Windows bots trying
to run the compilation without Java. A GN flag has since been added
which fixes the issue.

Original: https://chromium-review.googlesource.com/c/chromium/src/+/954822

Bug: 632206
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Iee3e684bd66873deaab742ad9d545a8c1b8dd8ce
Tbr: dpapad@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/985712Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: calamity <calamity@chromium.org>
Commit-Queue: calamity <calamity@chromium.org>
Cr-Commit-Position: refs/heads/master@{#547974}