Revert "In password fields, show one dot per grapheme cluster."

This reverts commit 7d0f75c321cae8a33f60fd291157d4c5d3fa9d01.

Reason: This change introduced a potential security risk,
wherein inserting particular strings of characters into a
text field could cause a DCHECK failure in
TextRunConstructor.cpp.

It should be relanded once it can be verified that it
doesn't cause a problem like https://crbug.com/751193.

Bug: 751193, 486880
Change-Id: Iaa0c603ec1ee53fc3d093e392b2a27b778f8bb94
Reviewed-on: https://chromium-review.googlesource.com/611387
Reviewed-by: Emil A Eklund <eae@chromium.org>
Commit-Queue: Emil A Eklund <eae@chromium.org>
Cr-Commit-Position: refs/heads/master@{#493809}
3 files changed