Clean up stray logs in startup_browser_impl.cc

Some LOG(ERROR)s were left in startup_browser_impl.cc

TBR=sky@chromium.org

Review URL: https://codereview.chromium.org/105913004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239143 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239143
Allow access to zipped files in Chrome OS Files.app zipping utility process.

Previously the zip file creator process was run without EnableZygote,
but from r232906 it is enabled by default. To allow file access
(which is indeed necessary for zipping), exposed path must be explicitly set.

BUG=323386

Review URL: https://codereview.chromium.org/106273002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239144 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239144