Does not update dock alignment on resize

BUG=330664
TEST=ash_unittests --gtest_filter=*DockedWindowResizerTest.ResizingKeepsDockedState*

Review URL: https://codereview.chromium.org/136983002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245094 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245094