Remove scheme restriction for extension context menu items.

chrome/common/extensions/docs/static/contextMenus.html

 <div id="pageData-name" class="pageData">Context Menus</div>
 
 <!-- BEGIN AUTHORED CONTENT -->
 <p>
 The context menus module allows you
 to add items to Google Chrome's context menu.
 </p>
 
 <p>
 You can choose what types of objects
 your context menu additions apply to,
 such as images, hyperlinks, and pages.
 </P>
 
 <p>
 You can create as many context menu items
 as you need, but if more than one
 from your extension is visible at once,
 Google Chrome automatically collapses them
 into a single parent menu.
 </p>
 
+<p>
+Context menu items can appear in any document
+(or frame within a document),
+even those with file:// or chrome:// URLs.
+To control which documents your items can appear in,
+specify the documentUrlPatterns field
+when you call the create() or update() method.
+</p>
+
+<p class="note">
+<strong>Version note:</strong>
+Before Chrome 14, <!-- PENDING(asargent): fix version # -->
+your items could appear only in documents with http://
+or https:// URLs.
+</p>
+
 <h2 id="manifest">Manifest</h2>
 <p>You must declare the "contextMenus" permission
 in your extension's manifest to use the API.
 Also, you should specify a 16x16-pixel icon
 for display next to your menu item.
 For example:
 </p>
 
 <pre>{
   "name": "My extension",
   ...
   "permissions": [
     <b>"contextMenus"</b>
   ],
   "icons": {
     <b>"16": "icon-bitty.png",</b>
     "48": "icon-small.png",
     "128": "icon-large.png"
   },
   ...
 }</pre>
 
 <h2 id="examples">Examples</h2>
 
 <p>
 You can find samples of this API on the
 <a href="samples.html#contextMenus">sample page</a>.
 
 <!-- END AUTHORED CONTENT -->