[Files.app] Make the border colors match the spec.

BUG=252851
TEST=manually tested
R=hirono@chromium.org

Review URL: https://codereview.chromium.org/26800002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227900 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227900
Files.app: Ensure to hide the spinner.

Originally the method to hide spinner is called before the scanInProgress_ flag
is updated. This is caused to prevent the spinner hiding.
This CL ensure that the method is called after the flag is set.

BUG=305111
TEST=manually
R=mtomasz@chromium.org, yoshiki@chromium.org

Review URL: https://codereview.chromium.org/26288004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227901 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227901