Rename stale SyncContentResolverWrapper occurrences to SyncContentResolverDelegate.

The relevant CL where renaming was done: https://chromiumcodereview.appspot.com/11929040/

Review URL: https://codereview.chromium.org/59883009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234816 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 234816