Reland of "Moves mojo_js_integration_tests into blink."

This reverts commit aa273aed7238cabd05b59be36b5eee9ce62f000c.

Reason for revert: I have disabled the test on Android and filed
crbug.com/741925 to track data dependency issue on Android test bots.

TBR=jbroman,dpranke,yzshen

Bug: 699569
Change-Id: Ic007cf56937c586b90fc3b68a76369cd489aff53
Reviewed-on: https://chromium-review.googlesource.com/568272
Reviewed-by: Alok Priyadarshi <alokp@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: Yuzhu Shen <yzshen@chromium.org>
Commit-Queue: Alok Priyadarshi <alokp@chromium.org>
Cr-Commit-Position: refs/heads/master@{#486232}
14 files changed