GitLab

This CL implements share functionality.
1 - Videos will be shared from share button click through a share
intent chooser.
2 - At startup, Chrome will save all the video share URLs in a
shared preference.
3 - At the receipient end, LaunchIntentDispatcher will check through
the saved shared pref to see if it is a video tutorial URL. If yes,
a video player will be launched.

Bug: 1117180
Change-Id: If169eab9053b2092532e4d48da8903bc06cf4813
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2437785
Commit-Queue: Shakti Sahu <shaktisahu@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827630}