Only purge plug-in list caches for renderers belonging to a given profile.

Also, unify the behavior when we detect that plug-ins on disk have changed. We should purge the caches in that case, but not force a page reload.

BUG=99459
TEST=


Review URL: http://codereview.chromium.org/8231007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@105050 0039d316-1c4b-4281-b951-d872f2087c98
10 files changed