Add default zoom functionality to chrome.tabs Zoom API.

chrome/common/extensions/docs/examples/api/tabs/zoom/popup.html

Index: chrome/common/extensions/docs/examples/api/tabs/zoom/popup.html
diff --git a/chrome/common/extensions/docs/examples/api/tabs/zoom/popup.html b/chrome/common/extensions/docs/examples/api/tabs/zoom/popup.html
index b224234607c9b6beaaccb6ca97605d47a885aed4..8b7f276c1183d4d4823dc045b345be5c4c22150f 100644
--- a/chrome/common/extensions/docs/examples/api/tabs/zoom/popup.html
+++ b/chrome/common/extensions/docs/examples/api/tabs/zoom/popup.html
@@ -30,7 +30,8 @@
           <td><button type="button" id="increaseButton">+</button></td>
         </td>
       </table>
-      <button type="button" id="defaultButton">Reset to 100%</button>
+      <button type="button" id="defaultButton">Reset to Default</button>
+      <div id="defaultLabel"></div>
     </div>
     <p>
     <div style="border-width: 2px; border-style: solid; border-color: #7f0000; padding: 2px">