Remove enhanced bookmarks extension

Remove enhanced bookmarks extension

Experimentation around bookmark styling in Chrome is being conducted
in a separate extension, so this in-tree component extension is no
longer needed.

This reverts r226314.

BUG=311282
R=estade@chromium.org, kalman@chromium.org, sky@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=258008

[Mike Wittman, 2014-03-17 18:33:07]

PTAL

estade: everything
kalman: chrome/{browser,common}/extensions
sky: chrome/browser/browser_resources.grd,
chrome/browser/ui/browser_navigator.cc

[sky, 2014-03-17 20:54:05]

LGTM

[Evan Stade, 2014-03-17 20:56:55]

lgtm

[not at google - send to devlin, 2014-03-18 22:48:48]

lgtm, apologies for delay

[Mike Wittman, 2014-03-18 22:51:05]

The CQ bit was checked by wittman@chromium.org

[commit-bot: I haz the power, 2014-03-18 22:52:24]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/wittman@chromium.org/200063003/1

[commit-bot: I haz the power, 2014-03-18 22:59:11]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-03-18 22:59:11]

Try jobs failed on following builders:
  tryserver.chromium on linux_chromium_clang_dbg

[Mike Wittman, 2014-03-19 16:52:39]

Committed patchset #1 manually as r258008 (presubmit successful).