Stick edge to both window and work area at the same time

BUG=334280
TEST=WorkspaceWindowResizerTestSticky.StickToBothEdgeAndWindow

Review URL: https://codereview.chromium.org/163833003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251244 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251244