Revert "Rename polymer and cr_elements v0_8 to v1_0"

third_party/polymer/v0_8/components/iron-pages/iron-pages.html

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 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
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@@ skipping 63 matching lines @@
     observers: [
       '_selectedPageChanged(selected)'
     ],
 
     _selectedPageChanged: function(selected, old) {
       this.async(this.notifyResize);
     }
   });
 
 </script>