Use ICU script code "Jpan" instead of "Hrkt" in Japanese pref names

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 10 matching lines @@
 <a href="http://www.w3.org/TR/CSS21/fonts.html#generic-font-families">CSS generic font families</a>
 and are listed in the API reference below. When a webpage specifies a generic
 font family, Chrome selects the font based on the corresponding setting. If no
 generic font family is specified, Chrome uses the setting for the "standard"
 generic font family.</p>
 
 <p>When a webpage specifies a language, Chrome selects the font based on the
 setting for the corresponding language script. If no language is specified,
 Chrome uses the setting for the default, or global, script.</p>
 
-<p>The supported language scripts are based on ISO 15924 script codes and listed
-in the API reference below. Technically, Chrome settings are not strictly
+<p>The supported language scripts are specified by ISO 15924 script code and
+listed in the API reference below. Technically, Chrome settings are not strictly
 per-script but also depend on language. For example, Chrome chooses the font for
-Hangul (ISO 15924 script code "Hang") when a webpage specifies Korean language,
-and uses this font not just for Hangul script but for everything the font
-covers, such as Hanja.</p>
-
-<p>Although ISO 15924 provides script codes like "Japn" for Japanese and "Kore"
-for Korean, these codes are newer than "Hrkt" and "Hang" which Chrome continues
-to use for compatibility purposes.</p>
+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); }
 );
 </pre>
 
 <p>The next snippet sets the sans-serif font for Japanese.</p>
 <pre>
 chrome.experimental.fontSettings.setFont(
-  { genericFamily: 'sansserif', script: 'Hrkt', fontName: 'IPAPGothic' }
+  { genericFamily: 'sansserif', script: 'Jpan', fontName: '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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