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Test covers the crash in bug 871769. That was fixed with CommandDispatcher forwarding BrowsingDataCommands protocol methods. ApplicationCommands conforms to BrowsingDataCommands, but tabgrid coordinator needs to explicitly dispatch both.

Change-Id: I484f37864f2620eaa85c44e3a20c6d4aebd2f072
Reviewed-on: https://chromium-review.googlesource.com/1171796
Commit-Queue: Chris Lu <thegreenfrog@chromium.org>
Reviewed-by: edchin <edchin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583389}