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When the UIRefresh flag is enabled, additional actions are added to the
share menu.  These actions end up pushing the Print action off of the
first screenful of items, so tests must be updated to scroll the
collection view if needed.

Also converts a History egtest to use a constant for an a11y identifier
and to avoid inadvertently dismissing the history ui.

BUG=825431

Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I1efebb04d1de54dcef7c2c7d3374eff2c61c9838
Reviewed-on: https://chromium-review.googlesource.com/1083723Reviewed-by: Justin Cohen <justincohen@chromium.org>
Commit-Queue: Rohit Rao <rohitrao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563978}