Font Settings API: Use Chrome settings CSS in sample extension.

chrome/common/extensions/docs/examples/api/fontSettings/options.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.
 
 // Mapping between font list ids and the generic family setting they
 // represent.
 var genericFamilies = [
   { fontList: 'standardFontList', name: 'standard' },
   { fontList: 'serifFontList', name: 'serif' },
   { fontList: 'sansSerifFontList', name: 'sansserif' },
   { fontList: 'fixedFontList', name: 'fixed' }
 ];
 
 // Ids of elements to contain the "Lorem ipsum" sample text.
 var sampleTextDivIds = [
   'standardFontSample',
   'serifFontSample',
   'sansSerifFontSample',
-  'fixedFontSample'
+  'fixedFontSample',
+  'minFontSample'
 ];
 
 var defaultSampleText = 'Lorem ipsum dolor sit amat.';
 var scriptSpecificSampleText = {
   // "Cyrllic script".
   'Cyrl': 'Кириллица',
   'Hang': '정 참판 양반댁 규수 큰 교자 타고 혼례 치른 날.',
   'Hans': '床前明月光，疑是地上霜。举头望明月，低头思故乡。',
   'Hant': '床前明月光，疑是地上霜。舉頭望明月，低頭思故鄉。',
   'Jpan': '吾輩は猫である。名前はまだ無い。',
@@ skipping 210 matching lines @@
   initFontSizePref('minFontSize',
                    chrome.fontSettings.getMinimumFontSize,
                    chrome.fontSettings.setMinimumFontSize,
                    chrome.fontSettings.onMinimumFontSizeChanged);
 
   var clearButton = document.getElementById('clearButton');
   clearButton.addEventListener('click', clearAllSettings);
 }
 
 document.addEventListener('DOMContentLoaded', init);