[Files.app] Show the filename search for executables in suggest-apps dialog

Previously, even for executables, the suggest-apps sialog showed the result of extension & mime search. With this patch, it shows the result of filename search instead.

BUG=208285
TEST=manually tested
R=hirono@chromium.org

Review URL: https://codereview.chromium.org/50493009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232169 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232169