Replace obsolete GetDefaultProfile with GetActiveUserProfile

BUG=322682
R=benwells@chromium.org

Review URL: https://codereview.chromium.org/111753004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240635 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240635
Fix sql recovery percentage-recovered histogram.

I don't always post percentage histograms, but when I do I get the math
wrong.

This is probably too late for Favicons, but Top Sites just landed so it
will be helpful there.

BUG=none

Review URL: https://codereview.chromium.org/111893012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240636 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240636