[Mac] Rebuild the wrench menu each time it is opened.

XIB Changes:
* Moved custom views for the wrench menu items from Toolbar.xib to WrenchMenu.xib.

BUG=96608
TEST=Wrench menu works the same as before.

Review URL: http://codereview.chromium.org/8289014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@105838 0039d316-1c4b-4281-b951-d872f2087c98
11 files changed