licensing: toogle all licenses in one click.
licensing: toogle all licenses in one click.

TEST=generated license file, tested buttons
BUG=chromium:319909

Change-Id: Ic943651367be988edd42a66b2c836372fb05aa93
Reviewed-on: https://chromium-review.googlesource.com/189391
Reviewed-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>
Tested-by: Marc MERLIN <7073d0fab1ea36cd0c0f1f603a2a5e44b931b31c@chromium.org>

chadversary/chromiumos.chromite,chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite