[Files.app] Hide files beginning with '.' (dot).

This patch is a revert of r234889 "[Files.app] Show files beginning with '.' (dot)", which causes Issue 330513.

BUG=196539, 330513

> [Files.app] Show files beginning with '.' (dot)
> 
> BUG=196539
> TEST=manually tested
> R=hirono@chromium.org
> 
> Review URL: https://codereview.chromium.org/71503003

TBR=yoshiki@chromium.org

Review URL: https://codereview.chromium.org/127803002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243514 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243514
Disabel nacl_newlib.run_breakpad_crash_in_syscall_test

BUG=332331
TBR=bbudge@chromium.org

Review URL: https://codereview.chromium.org/127813002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243515 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243515