Reduce usage of webkit prefixes in extension examples

chrome/common/extensions/docs/templates/articles/api_other.html

 <h1>Web APIs</h1>
 
 <p>
 In addition to the
 <a href="api_index">chrome.* APIs</a>,
 extensions can use all the APIs
 that the browser provides
 to web pages and apps.
 If the browser doesn't support an API you want to use,
 you can bundle additional API libraries into your extension.
@@ skipping 82 matching lines @@
 <dt><strong> WebKit APIs </strong></dt>
 <dd>
   Because Google Chrome is built upon WebKit,
   your extensions can use WebKit APIs.
   Especially useful are the experimental CSS features
   such as filters, animations, and transformations.
   Here's an example of using WebKit styles
   to make the UI spin:
   <pre>&lt;style>
   div:hover {
-    -webkit-transform: rotate(360deg);
-    -webkit-transition: all 1s ease-out;
+    transform: rotate(360deg);
+    transition: all 1s ease-out;
   }
 &lt;/style>
 </pre>
   
 </dd>
 <dt><strong> V8 APIs</strong>, such as<strong> JSON </strong></dt>
 <dd> Because JSON is in V8, you don't need to include a JSON library to use JSON functions. </dd>
 <dt><strong>APIs in bundled libraries</strong></dt>
 <dd> If you want to use a library that the browser doesn't provide
 (for example, jQuery),
 you can bundle that library's JavaScript files with your extension.
 Bundled libraries work in extensions
 just as they do in other web pages.
 </dd>
 </dl>