Remove child views before models in network dialogs

BUG=294330

Review URL: https://codereview.chromium.org/25674008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226765 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226765
cc: Support animating filters

This adds a new Animation::TargetProperty for filters, and
updates LayerAnimationController to support this new
target.

BUG=181613

Review URL: https://codereview.chromium.org/25311003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226766 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226766