Revert of Upstream Enhanced Bookmark Model (patchset #6 id:100001 of https://codereview.chromium.org/899403002/)

Reason for revert:
This is blocking downstream and people are complaining.  I tried to land the downstream fix but there was a compile problem.

Sorry, hope you can fix the problems and re-land.

Original issue's description:
> Upstream Enhanced Bookmark Model
>
> This is the data layout of enhanced bookmark. There is no reason why
> this class should live in private repository.
>
> BUG=428832
>
> Committed: https://crrev.com/691b64f43fc0a69752344e5edbbc4d8f406cf261
> Cr-Commit-Position: refs/heads/master@{#315939}

TBR=kkimlabs@chromium.org,newt@chromium.org,cjhopman@chromium.org,ianwen@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=428832

Review URL: https://codereview.chromium.org/920043003

Cr-Original-Commit-Position: refs/heads/master@{#315976}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: f40cb64710a333da6d554e98dfcc432cd6cf8f1f

get_landmines.py

@@ -29,7 +29,6 @@ def print_landmines():
     print 'Need to clobber winja goma due to backend cwd cache fix.'
   if platform() == 'android':
     print 'Clobber: to handle new way of suppressing findbugs failures.'
-    print 'Clobber to fix gyp not rename package name (crbug.com/457038)'
   if platform() == 'win' and builder() == 'ninja':
     print 'Compile on cc_unittests fails due to symbols removed in r185063.'
   if platform() == 'linux' and builder() == 'ninja':