Take the Extension Storage API out of experimental.

chrome/common/extensions/docs/api_index.html

Index: chrome/common/extensions/docs/api_index.html
diff --git a/chrome/common/extensions/docs/api_index.html b/chrome/common/extensions/docs/api_index.html
index cb36de0eb7010673dfb1103f5a7b0b0248905403..6cc0f82538b0b0f06f43c03c35722eaa1e0ebb76 100644
--- a/chrome/common/extensions/docs/api_index.html
+++ b/chrome/common/extensions/docs/api_index.html
@@ -358,7 +358,7 @@ Here are the supported chrome.* APIs:
 </p>
 
 <ul>
-  <li><a href="bookmarks.html" js="">bookmarks</a></li><li><a href="browserAction.html" js="">browserAction</a></li><li><a href="contentSettings.html" js="">contentSettings</a></li><li><a href="contextMenus.html" js="">contextMenus</a></li><li><a href="cookies.html" js="">cookies</a></li><li><a href="debugger.html" js="">debugger</a></li><li><a href="extension.html" js="">extension</a></li><li><a href="fileBrowserHandler.html" js="">fileBrowserHandler</a></li><li><a href="history.html" js="">history</a></li><li><a href="i18n.html" js="">i18n</a></li><li><a href="idle.html" js="">idle</a></li><li><a href="management.html" js="">management</a></li><li><a href="omnibox.html" js="">omnibox</a></li><li><a href="pageAction.html" js="">pageAction</a></li><li><a href="pageCapture.html" js="">pageCapture</a></li><li><a href="permissions.html" js="">permissions</a></li><li><a href="proxy.html" js="">proxy</a></li><li><a href="tabs.html" js="">tabs</a></li><li><a href="tts.html" js="">tts</a></li><li><a href="ttsEngine.html" js="">ttsEngine</a></li><li><a href="types.html" js="">types</a></li><li><a href="webNavigation.html" js="">webNavigation</a></li><li><a href="webRequest.html" js="">webRequest</a></li><li><a href="windows.html" js="">windows</a></li>
+  <li><a href="bookmarks.html" js="">bookmarks</a></li><li><a href="browserAction.html" js="">browserAction</a></li><li><a href="contentSettings.html" js="">contentSettings</a></li><li><a href="contextMenus.html" js="">contextMenus</a></li><li><a href="cookies.html" js="">cookies</a></li><li><a href="debugger.html" js="">debugger</a></li><li><a href="extension.html" js="">extension</a></li><li><a href="fileBrowserHandler.html" js="">fileBrowserHandler</a></li><li><a href="history.html" js="">history</a></li><li><a href="i18n.html" js="">i18n</a></li><li><a href="idle.html" js="">idle</a></li><li><a href="management.html" js="">management</a></li><li><a href="omnibox.html" js="">omnibox</a></li><li><a href="pageAction.html" js="">pageAction</a></li><li><a href="pageCapture.html" js="">pageCapture</a></li><li><a href="permissions.html" js="">permissions</a></li><li><a href="proxy.html" js="">proxy</a></li><li><a href="storage.html" js="">storage</a></li><li><a href="tabs.html" js="">tabs</a></li><li><a href="tts.html" js="">tts</a></li><li><a href="ttsEngine.html" js="">ttsEngine</a></li><li><a href="types.html" js="">types</a></li><li><a href="webNavigation.html" js="">webNavigation</a></li><li><a href="webRequest.html" js="">webRequest</a></li><li><a href="windows.html" js="">windows</a></li>
 </ul>
 
 <h2 id="experimental">Experimental APIs</h2>