Make removeStyleFromRulesAndContext() to use style resolver within style clean

This patch makes |EditingStyle::removeStyleFromRulesAndContext()| to call
|styleFromMatchedRulesForElement()| within style clean.

BUG=627692
TEST=LayoutTests/editing/execCommand/insert_list/insert_list_in_summary_crash.html

Review-Url: https://codereview.chromium.org/2147163002
Cr-Commit-Position: refs/heads/master@{#405445}
2 files changed