Revert "Add vulcanize to tools."

This reverts r243708  which is causing a build failure:
http://build.chromium.org/p/chromium.linux/builders/Android%20Builder%20%28dbg%29/builds/50092

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243715 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243715
[chromeos] Add an about:power UI.

This UI currently only displays battery charge percentage over time.
Later iterations will add more plots.

BUG=312956

Review URL: https://codereview.chromium.org/123713002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243716 0039d316-1c4b-4281-b951-d872f2087c98
Properly launch the connectivity diagnostics app from the offline page

BUG=332175
R=xiyuan@chromium.org

Review URL: https://codereview.chromium.org/129693002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243717 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243717