Use JSON schema compiler for i18n api

chrome/common/extensions/api/i18n.json

Index: chrome/common/extensions/api/i18n.json
diff --git a/chrome/common/extensions/api/i18n.json b/chrome/common/extensions/api/i18n.json
index b497eb54059b8b991c63ea7000395d71e41ece1e..db3c3f6ca838dceda330c702547acd557438a33b 100644
--- a/chrome/common/extensions/api/i18n.json
+++ b/chrome/common/extensions/api/i18n.json
@@ -27,7 +27,8 @@
         "unprivileged": true,
         "description": "Gets the localized string for the specified message. If the message is missing, this method returns an empty string (''). If the format of the <code>getMessage()</code> call is wrong &mdash; for example, <em>messageName</em> is not a string or the <em>substitutions</em> array has more than 9 elements &mdash; this method returns <code>undefined</code>.",
         "parameters": [
-          { "type": "string",
+          {
+            "type": "string",
             "name": "messageName",
             "description": "The name of the message, as specified in the <a href='i18n-messages.html'><code>messages.json</code></a> file."
           },