Move Extension and PermissionsData to extensions/common.

BUG=298586
R=cdn@chromium.org, miket@chromium.org, sky@chromium.org
TBR=cdn@chromium.org

Review URL: https://codereview.chromium.org/15239002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235462 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235462
Making rAc wallet icon smaller.

R=dbeam@chromium.org, oshima@chromium.org
BUG=315973

Review URL: https://codereview.chromium.org/71213003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235465 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235465