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Use the gles2 apis which are meant to be used with shared image
mailboxes.

We were using legacy mailbox gles2 apis till now here in
VideoResourceUpdater::CopyHardwarePlane.
It was fine since this code was only used by android video path
which always creates shared image mailboxes and registers it with
a legacy mailbox. Hence it works with both shared image and legacy
gles2 apis.

Updating this code in order to convert everything to shared
images eventually and get rid of legacy mailbox system.

Bug: 900973
Change-Id: I3b9c97f938cd4d15740cd1b6007eaae8f4ef2c2f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1978907
Commit-Queue: vikas soni <vikassoni@chromium.org>
Reviewed-by: Frank Liberato <liberato@chromium.org>
Reviewed-by: Eric Karl <ericrk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727222}