Fix some grammar in chrome/common/extensions/docs/

chrome/common/extensions/docs/js/api_page_generator.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview This file is the controller for generating extension
  * doc pages.
  *
  * It expects to have available via XHR (relative path):
  *   1) API_TEMPLATE which is the main template for the api pages.
@@ skipping 117 matching lines @@
 }
 
 // Assigns all keys & values of |obj2| to |obj1|.
 function extend(obj, obj2) {
   for (var k in obj2) {
     obj[k] = obj2[k];
   }
 }
 
 /*
- * Main entry point for composing the page. It will fetch it's template,
+ * Main entry point for composing the page. It will fetch its template,
  * the extension api, and attempt to fetch the matching static content.
- * It will insert the static content, if any, prepare it's pageData then
+ * It will insert the static content, if any, prepare its pageData then
  * render the template from |pageData|.
  */
 function renderPage() {
   // The page name minus the '.html' extension.
   pageBase = document.location.href.match(/\/([^\/]*)\.html/)[1];
   if (!pageBase) {
     alert('Empty page name for: ' + document.location.href);
     return;
   }
 
@@ skipping 59 matching lines @@
     var data = JSON.parse(JSON.minify(sampleManifest));
     samples = data.samples;
     apiMapping = data.api;
     renderTemplate();
   }, function(error) {
     renderTemplate();
   });
 }
 
 /**
- * Fetches |url| and returns it's text contents from the xhr.responseText in
+ * Fetches |url| and returns its text contents from the xhr.responseText in
  * onSuccess(content)
  */
 function fetchContent(url, onSuccess, onError) {
   var localUrl = url;
   var xhr = new XMLHttpRequest();
   var abortTimerId = window.setTimeout(function() {
     xhr.abort();
     console.log('XHR Timed out');
   }, REQUEST_TIMEOUT);
 
@@ skipping 448 matching lines @@
   }
   if (a.name > b.name) {
     return 1;
   }
   return 0;
 }
 
 function disableDocs(obj) {
   return !!obj.nodoc || !!obj.internal;
 }