Reviewed by Darin.
<rdar://problem/
5415006> Command Left in a To Do causes caret to disappear
* editing/selection/mixed-editability-8.html: Added.
* editing/selection/mixed-editability-9.html: Added.
* platform/mac/editing/selection: Added.
* platform/mac/editing/selection/mixed-editability-8-expected.checksum: Added.
* platform/mac/editing/selection/mixed-editability-8-expected.png: Added.
* platform/mac/editing/selection/mixed-editability-8-expected.txt: Added.
* platform/mac/editing/selection/mixed-editability-9-expected.checksum: Added.
* platform/mac/editing/selection/mixed-editability-9-expected.png: Added.
* platform/mac/editing/selection/mixed-editability-9-expected.txt: Added.
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@25281
268f45cc-cd09-0410-ab3c-
d52691b4dbfc