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This is a reland of cdf4606b.
Retrying to land this now that crbug.com/833656 is fixed.

Original change's description:
> Roll closure compiler
>
> Latest compiler version does not include Chrome's externs by default. They
> need to be explicitly included.
>
> Change log:
> https://github.com/google/closure-compiler/compare/8fc82299c45b0a33f19834222acda4850fd77bc0...5cae9b78a16a2655627733b66d1c686d5f547925
> chrome.js: 7ef3422e1e87480d560247d75fee181b4cac24d9
> chrome_extensions.js: 3a0b0052782af3f0bd3a5fe10bb568cdd769db4e -> 03c824e85e7b77bde4e7449ed3727608b05b2acc
> polymer-1.0.js: 55e962227e676cd30f81439573771326933aae54 -> 8f3b8c9354813ae0e2f186bf2f504cf3f3182a66
>
> BUG=831004
>
> Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
> Change-Id: I0db559ee9a198dadd3b23e57b835cc6b985540a9
> Reviewed-on: https://chromium-review.googlesource.com/1006182
> Reviewed-by: calamity <calamity@chromium.org>
> Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#551058}

TBR=calamity

Bug: 831004
Change-Id: I0966b1a07da3b6318fb22a6bc6393eb499446743
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Reviewed-on: https://chromium-review.googlesource.com/1015180Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551445}