Android: Not calling maybeMergeTabs on startup

maybeMergeTabs is called on cold starts. It's an expenisve operation,
and doesn't appear to do anything except in the case when there is a
process restarted, as in
https://bugs.chromium.org/p/chromium/issues/detail?id=657418

Testing: followed the Testing Multi-Instance Merging testing doc.
https://docs.google.com/document/d/1KDykYo9M63O0zFeDdrV9BUYtomQl4dVnbVgssCyydng

Bug: 867596
Change-Id: I1a0a42fe75d2487dfc71382d7fb55bbc0636e5a7
Reviewed-on: https://chromium-review.googlesource.com/1153438
Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Sam Maier <smaier@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579574}
1 file changed