hterm: text_attributes: js compilation
hterm: text_attributes: js compilation

Bug: 998928
Change-Id: Ic0178f4a601561a5886374e4dab46afc57f1bf6d
Reviewed-on: https://chromium-review.googlesource.com/c/apps/libapps/+/1816332
Reviewed-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

chromium/hterm,chromium/hterm,chromium/hterm,chromium/hterm