Revert r228333 "RLZTracker refactoring/cleanup"
 Speculative revert due to the test failure on windows.
 (http://master.chrome.corp.google.com:8011/builders/win%20trunk/builds/12342/steps/unit_tests/logs/stdio)

TBR=rogerta@chromium.org,
BUG=306195,311339

Review URL: https://codereview.chromium.org/40173003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230793 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230793