GitLab

Events arising from clicks on instance elements in SVG <use> trees may have their
target changed when the instance tree is rebuilt during event processing. In this
case the toNode() call will return NULL for the target.

BUG=171363

Review URL: https://chromiumcodereview.appspot.com/12248003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@182049 0039d316-1c4b-4281-b951-d872f2087c98