Use bigger tab view under accessibility font size.

This CL adjusts the size of tab views and height of their titles in tab
grid under accessibility font size. Title will be displayed in 2 lines
when accessibility font size is chosen.

Screen shots:
iPhoneXR:   https://drive.google.com/open?id=1anVBsA3cOBumUqt38OpM6FtprLBFfup5

iPad landscape:
50%:  https://drive.google.com/open?id=1E9m9Viqhval_l9Est8U1-sQktI7c_38l
66%:  https://drive.google.com/open?id=1GuXD-miJgBPL3FnhlSRLoDrKMFa9xv0w
100%: https://drive.google.com/open?id=1jiAutUdf-wcACcckxtFbJFmS_S-2f7t2

iPad Portrait:
40%:  https://drive.google.com/open?id=1A9WsE-_vT0kdzuAhEDNQH-UQtVqLGF53
60%:  https://drive.google.com/open?id=1CR-holR-9JcuvMBjadrzWjcoDFuaJU4i
100%: https://drive.google.com/open?id=1k8BCFtqKavozdpoihA7tYg3PT7ho7Eo7

Bug: 893540
Change-Id: I314d081439909cf6f3711d06df579c73a9685e99
Reviewed-on: https://chromium-review.googlesource.com/c/1409546
Reviewed-by: edchin <edchin@chromium.org>
Commit-Queue: Yi Su <mrsuyi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#623172}
5 files changed