Swap selected and highlighted colors in app launcher
The selected color is now darker than the highlighted color, which
makes the fact that the keyboard will operate on the selected item
more obvious.
This change also changes how the colors in the search result list
are worked out.
Some animation handling code is also removed as the hover animation
has been removed.
BUG=234666
Review URL: https://chromiumcodereview.appspot.com/
14900009
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@199446 0039d316-1c4b-4281-b951-d872f2087c98