Add getFontList() to Font Settings Extension API.

chrome/test/data/extensions/api_test/font_settings/test.js

Index: chrome/test/data/extensions/api_test/font_settings/test.js
diff --git a/chrome/test/data/extensions/api_test/font_settings/test.js b/chrome/test/data/extensions/api_test/font_settings/test.js
index d364473ad80994578ec242195926950678449105..bef1e3798213cf0a0ccf1b53a56282f9308b3365 100644
--- a/chrome/test/data/extensions/api_test/font_settings/test.js
+++ b/chrome/test/data/extensions/api_test/font_settings/test.js
@@ -45,5 +45,16 @@ chrome.test.runTests([
     fs.getFontName({
       genericFamily: 'sansserif'
     }, expect({fontName: expected}, message));
+  },
+
+  function getFontList() {
+    var message = 'getFontList should return an array of objects with ' +
+        'fontName and localizedName properties.';
+    fs.getFontList(chrome.test.callbackPass(function(value) {
+      chrome.test.assertTrue(value.length > 0,
+                             "Font list is not expected to be empty.");
+      chrome.test.assertEq('string', typeof(value[0].fontName), message);
+      chrome.test.assertEq('string', typeof(value[0].localizedName), message);
+    }));
   }
 ]);