docs: Fix some broken links to samples where the #hash-word is supposed to be a search term.

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

 <h1>Content Scripts</h1>
 
 
 <p>
 Content scripts are JavaScript files that run in the context of web pages.
 By using the standard
 <a href="http://www.w3.org/TR/DOM-Level-2-HTML/">Document
 Object Model</a> (DOM),
 they can read details of the web pages the browser visits,
 or make changes to them.
@@ skipping 437 matching lines @@
 <pre>
 <em>//Code for displaying &lt;extensionDir>/images/myimage.png:</em>
 var imgURL = <b>chrome.extension.getURL("images/myimage.png")</b>;
 document.getElementById("someImage").src = imgURL;
 </pre>
 
 <h2 id="examples"> Examples </h2>
 
 <p>
 You can find many
-<a href="samples#script">examples that use content scripts</a>.
+<a href="samples#search:script">examples that use content scripts</a>.
 A simple example of communication via messages is in the
 <a href="samples#message-timer">Message Timer</a>.
 See <a href="samples#page-redder">Page Redder</a> and
 <a href="samples#email-this-page-(by-google)">Email This Page</a>
 for examples of programmatic injection.
 </p>
 
 
 <h2 id="videos"> Videos </h2>
 
 <p>
 The following videos discuss concepts that are important for content scripts.
 The first video describes content scripts and isolated worlds.
 </p>
 
 <div class="video-container">
   <iframe title="YouTube video player" width="640" height="390" src="//www.youtube.com/embed/laLudeUmXHM?rel=0" frameborder="0" allowfullscreen></iframe>
 </div>
 
 <p>
 The next video describes message passing,
 featuring an example of a content script
 sending a request to its parent extension.
 </p>
 
 <div class="video-container">
   <iframe title="YouTube video player" width="640" height="390" src="//www.youtube.com/embed/B4M_a7xejYI?rel=0" frameborder="0" allowfullscreen></iframe>
 </div>