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This cl changes several specs of TabbedPane in highlight vertical mode:
1. Max row length should be capped at 192, with right padding of 8px.
For long text, truncate with ellipsis.
2. Change active color from #4285F4 to #1A73E8.
3. Do not show MdTab border when focusing in highlighted mode. Instead
hightlighing with darker blue.

Bug: 822382
Test: manual.
Change-Id: I455aa2ecdf6d07c4aa34a2438af1dca1266030a3
Reviewed-on: https://chromium-review.googlesource.com/1114288
Commit-Queue: Tao Wu <wutao@chromium.org>
Reviewed-by: Michael Wasserman <msw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570285}