Password manager: Ensure correct password is shown when a filter is active.

BUG=303893
TEST=See repro steps in bug.
R=bauerb@chromium.org

Review URL: https://codereview.chromium.org/26003002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227001 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227001