commit d607a605c05ae726b55aa3a28b32c94a2ab597ff
author yoichio <yoichio@chromium.org> Thu Jul 14 06:28:09 2016
committer Commit bot <commit-bot@chromium.org> Thu Jul 14 06:30:56 2016
tree c756d560942b413f74e23a6dd01bdc902272087f
parent 93437e07f5a150f8ea3511c8543ec6571dd5be14

Contenteditable w/ "-webkit-user-select:all" should be editable.

<div id ="div" style="-webkit-user-select:all"  contenteditable="true"></div>
 should be editable.
In this CL, we ignore "-webkit-user-select:all" if element has
 |contenteditable="true| in
 Node::hasEditableStyle and  expandSelection by user click.

BUG=618920
TEST=editing/selection/user-select/user-select-all-contenteditable.html, mouse/click-
user-select-all-textarea.html, user-select/user-select-all-contenteditable.html

Review-Url: https://codereview.chromium.org/2120913002
Cr-Commit-Position: refs/heads/master@{#405440}