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": [],
+    "types": [
+      {
+        "id": "LanguageCode",
+        "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>."
+      }
+    ],
     "functions": [
       {
         "name": "getAcceptLanguages",
         "type": "function",
         "description": "Gets the accept-languages of the browser. This is different from the locale used by the browser; to get the locale, use $(ref:i18n.getUILanguage).",
         "parameters": [
           {
             "type": "function",
             "name": "callback",
             "parameters": [
-              {"name": "languages", "type": "array", "items": {"type": "string"}, "description": "Array of the accept languages of the browser, such as en-US,en,zh-CN"}
+              {"name": "languages", "type": "array", "items": {"$ref": "LanguageCode"}, "description": "Array of LanguageCode"}
             ]
           }
         ]
       },
       {
         "name": "getMessage",
         "nocompile": true,
         "type": "function",
         "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": [
@@ skipping 17 matching lines @@
       {
         "name": "getUILanguage",
         "type": "function",
         "nocompile": true,
         "description": "Gets the browser UI language of the browser. This is different from $(ref:i18n.getAcceptLanguages) which returns the preferred user languages.",
         "parameters": [],
         "returns": {
           "type": "string",
           "description": "The browser UI language code such as en-US or fr-FR."
         }
+      },
+      {
+        "name": "detectLanguage",
+        "type": "function",
+        "description": "Detects the language of the provided text using CLD.",
+        "parameters": [
+          {
+            "type": "string",
+            "name": "text",
+            "minimum": 0,
+            "description": "User input string to be translated."
+          },
+          {
+            "type": "function",
+            "name": "callback",
+            "parameters": [
+              {
+                "type": "object",
+                "name": "result",
+                "description": "LanguageDetectionResult object that holds detected langugae reliability and array of DetectedLanguage",
+                "properties": {
+                  "isReliable": { "type": "boolean", "description": "CLD detected language reliability" },
+                  "languages":
+                    {
+                      "type": "array",
+                      "description": "array of detectedLanguage of size 0-3",
+                      "items":
+                        {
+                          "type": "object",
+                          "description": "DetectedLanguage object that holds detected ISO language code and its percentage in the input string",
+                          "properties":
+                            {
+                              "language":
+                                {
+                                  "$ref": "LanguageCode"
+                                },
+                              "percentage":
+                                {
+                                  "type": "integer",
+                                  "description": "The percentage of the detected language"
+                                }
+                            }
+                        }
+                    }
+                }
+              }
+            ]
+          }
+        ]
       }
     ],
     "events": []
   }
-]
+]