Create Open javascript action and set up histograms for contextMenu actions

Bug: 1140387
Change-Id: I836eff307c6de1a8b233c3018a9856799bd43513
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2584646
Commit-Queue: Cheick Cisse <cheickcisse@google.com>
Reviewed-by: Sebastien Lalancette <seblalancette@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836802}