[Font Settings API]: Rename fontName and localizedName to fontId and displayName

chrome/common/extensions/docs/static/experimental.fontSettings.html

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 <p>The Font Settings API allows you to manage Chrome's font settings.</p>
 
 <h2 id="manifest">Manifest</h2>
 <p>The Font Settings API is currently experimental, so you must declare the
 "experimental" permission to use it. For example:</p>
 <pre>{
   "name": "My Font Settings Extension",
   "description": "Customize your fonts",
@@ skipping 22 matching lines @@
 per-script but also depend on language. For example, Chrome chooses the font for
 Cyrillic (ISO 15924 script code "Cyrl") when a webpage specifies the Russian
 language, and uses this font not just for Cyrillic script but for everything the
 font covers, such as Latin.</p>
 
 <h2 id="examples">Examples</h2>
 <p>The following code gets the standard font for Arabic.</p>
 <pre>
 chrome.experimental.fontSettings.getFont(
   { genericFamily: 'standard', script: 'Arab' },
-  function(details) { console.log(details.fontName); }
+  function(details) { console.log(details.fontId); }
 );
 </pre>
 
 <p>The next snippet sets the sans-serif font for Japanese.</p>
 <pre>
 chrome.experimental.fontSettings.setFont(
-  { genericFamily: 'sansserif', script: 'Jpan', fontName: 'MS PGothic' }
+  { genericFamily: 'sansserif', script: 'Jpan', fontId: 'MS PGothic' }
 );
 </pre>
 
 <p>You can find a sample extension using the Font Settings API in the
 <a href="http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/api/fontSettings/">examples/api/fontSettings</a>
 directory. For other examples and for help in viewing the source code, see
 <a href="samples.html">Samples</a>.</p>
 
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