Just use git refs for lkcr and lkgr

R=iannucci@chromium.org, martiniss@chromium.org
BUG=640251
Recipe-Tryjob-Bypass-Reason: None of the affected recipes need safesync anyway, will manually roll

Review-Url: https://codereview.chromium.org/2268893004

recipe_modules/gclient/config.py

@@ -187,24 +187,12 @@ def chromium(c):
 
 @config_ctx(includes=['chromium'])
 def chromium_lkcr(c):
-  # TODO(phajdan.jr): Add git hashes for LKCR crbug.com/349277.
-  if c.GIT_MODE:
-    raise BadConf('Git has problems with safesync_url and LKCR, '
-                  'crbug.com/349277 crbug.com/109191')  # pragma: no cover
   s = c.solutions[0]
-  s.safesync_url = 'https://build.chromium.org/p/chromium/lkcr-status/lkgr'
-  # TODO(hinoka): Once lkcr exists and is a tag, it should just be lkcr
-  #               rather than origin/lkcr.
   s.revision = 'origin/lkcr'
 
 @config_ctx(includes=['chromium'])
 def chromium_lkgr(c):
   s = c.solutions[0]
-  safesync_url = 'https://chromium-status.appspot.com/lkgr'
-  if c.GIT_MODE:  # pragma: no cover
-    safesync_url = 'https://chromium-status.appspot.com/git-lkgr'
-    raise BadConf('Git has problems with safesync_url, crbug.com/109191.')
-  s.safesync_url = safesync_url
   s.revision = 'origin/lkgr'
 
 @config_ctx(includes=['chromium_bare'])