Remove chrome-extension-resource:// scheme

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

 <h1 id="import-existing-app">
   <span class="h1-step">Step 2:</span>
   Import an Existing Web App
 </h1>
 
 <p class="note">
   <strong>Want to start fresh from here?</strong>
   Find the previous step's code in the <a href="https://github.com/mangini/io13-codelab/archive/master.zip">reference code zip</a> under <strong><em>cheat_code > solution_for_step1</strong></em>.
 </p>
 
@@ skipping 53 matching lines @@
 
 <h2 id="csp-compliance">Make scripts Content Security Policy (CSP) compliant</h2>
 
 <p>Open the DevTools Console (<strong>right-click > Inspect Element</strong>, then select the <strong>Console</strong> tab). You will see an error about refusing to execute an inline script:</p>
 
 <figure>
   <img src="{{static}}/images/app_codelab/csp-console-error.png" alt="Todo app with CSP console log error">
   <!--
   <blockquote>
     > Refused to execute inline script because it violates the following Content <br>
-    > Security Policy directive: "default-src 'self' chrome-extension-resource:". <br>
+    > Security Policy directive: "default-src 'self'". <br>
     > Note that 'script-src' was not explicitly set, so 'default-src' is used as a <br>
     > fallback. <br>
     >  index.html:42
   </blockquote> 
   -->
 </figure>
 
 <p>Let's fix this error by making the app <a href="/apps/contentSecurityPolicy">Content Security Policy</a> compliant. 
 One of the most common CSP non-compliances is caused by inline JavaScript. Examples of inline JavaScript include event 
 handlers as DOM attributes (e.g. <code>&lt;button onclick=''&gt;</code>) and <code>&lt;script&gt;</code> tags with 
@@ skipping 654 matching lines @@
     <a href="/apps/storage#method-StorageArea-remove" title="Read 'chrome.storage.local.remove()' in the Chrome developer docs">chrome.storage.local.remove()</a> 
     <a href="#remove-items" class="anchor-link-icon" title="This feature mentioned in 'Remove todos items'">&#8593;</a>
   </li>
   <li>
     <a href="/apps/storage#method-StorageArea-remove" title="Read 'chrome.storage.local.clear()' in the Chrome developer docs">chrome.storage.local.clear()</a> 
     <a href="#remove-items" class="anchor-link-icon" title="This feature mentioned in 'Drop all todo items'">&#8593;</a>
   </li>
 </ul>
 
 <p>Ready to continue onto the next step? Go to <a href="app_codelab_alarms.html">Step 3 - Add alarms and notifications &raquo;</a></p>