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Previously, when tab button was clicked up to thumbnail view option in
gallery, the tooltip for the option did not work. This is also true of
slide view option in thumbnail mode. Both issues are resolved with this
patch.

BUG=549547
TEST=manually tested in the issue
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2626973004
Cr-Commit-Position: refs/heads/master@{#443156}