New thin layer of API extension chrome.i18n.detectLanguage

chrome/common/extensions/api/i18n.json

 // 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.
 
 [
   {
     "namespace": "i18n",
     "description": "Use the <code>chrome.i18n</code> infrastructure to implement internationalization across your whole app or extension.",
     "types": [],
     "functions": [
@@ skipping 37 matching lines @@
       {
         "name": "getUILanguage",
         "type": "function",
         "nocompile": true,
         "description": "Gets the browser UI language of the browser. This is different from $(ref:i18n.getAcceptLanguages) which returns the preferred user languages.",
         "parameters": [],
         "returns": {
           "type": "string",
           "description": "The browser UI language code such as en-US or fr-FR."
         }
+      },
+      {
+        "name": "detectLanguage",
+        "type": "function",
+        "description": "Detects the language of the provided text using CLD.",
+        "parameters": [
+          {
+            "type": "string",
+            "name": "text",
+            "minimum": 0,
+            "optional": true,
+            "description": "Defaults to the null string."
+          },
+          {
+            "type": "function",
+            "name": "callback",
+            "parameters": [
+              {
+                "type": "object",
+                "name": "result",
+                "description": "LanguageDetectionResult object that holds detected langugae reliability and array of DetectedLanguage",
+                "properties": {
+                  "is_reliable": { "type": "boolean", "description": "CLD detected language reliability" },
+                  "languages":
+                    {
+                      "type": "array",
+                      "description": "array of detectedLanguage",
+                      "items":
+                        {
+                          "type": "object",
+                          "description": "DetectedLanguage object that holds detected ISO language code and its percentage in the input string",
+                          "properties":
+                            {
+                              "language": { "type": "string", "description": "An ISO language code such as <code>en</code> or <code>fr</code>. For a complete list of languages supported by this method, see <a href='http://src.chromium.org/viewvc/chrome/trunk/src/third_party/cld/languages/internal/languages.cc'>kLanguageInfoTable</a>. The 2nd to 4th columns will be checked and the first non-NULL value will be returned except for Simplified Chinese for which zh-CN will be returned. For an unknown language, <code>und</code> will be returned." },
+                              "percentage": { "type": "integer", "description": "The percentage of the detected language" }
+                            }
+                        }
+                    }
+                }
+              }
+            ]
+          }
+        ]
       }
     ],
     "events": []
   }
 ]