Fix ResourceLoadTiming Resolution Issue 3rd step - remove old fields

This is 3rd step to Fix ResourceLoadTiming resolution issue, remove old fileds
and macros from blink, the new will be used as default.

Contributed by pan.deng@intel.com

BUG=242452

Review URL: https://chromiumcodereview.appspot.com/15863002

git-svn-id: svn://svn.chromium.org/blink/trunk@151363 bbb929c8-8fbe-4397-9dbb-9b2b20218538
10 files changed