Implement NamedProcessIterator in base/process_util_mac.mm.  Patch by Naoki
Takano <takano.naoki@gmail.com>

Review URL: http://codereview.chromium.org/18192
Review URL: http://codereview.chromium.org/21097

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@9263 0039d316-1c4b-4281-b951-d872f2087c98

• AUTHORS[diff]
• base/process_util.h[diff]
• base/process_util_linux.cc[diff]
• base/process_util_mac.mm[diff]
• base/process_util_posix.cc[diff]
• base/process_util_unittest.cc[diff]