Switch CertStore to RenderProcessHostObserver.

BUG=170921
TEST=no change

Review URL: https://codereview.chromium.org/68543003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236861 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236862 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236862
Roll deps2git 234015:236839

TBR=szager

BUG=317931

Review URL: https://codereview.chromium.org/83003004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236863 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236864 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236864