Add {cloud,glass,play}.google.com to the preloads.

R=rsleevi@chromium.org

Review URL: https://codereview.chromium.org/82703005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239005 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239005
Fix a bug in tracing instrumentation

The missing return statement causes all kinds of wrong thread badness
with watch events.

This was introduced with https://codereview.chromium.org/67683003/
or the reland of that.

BUG=270179
R=nduca@chromium.org

Review URL: https://codereview.chromium.org/106093002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239006 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239006