Updates RootWindowController to delete the keyboard container before recreating the keyboard controller since the controller creates a new window in GetWindowContainer().


BUG=299787

Review URL: https://codereview.chromium.org/25105002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226324 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226324