Added chrome.i18n extension API.

The API proposal doc is 
http://sites.google.com/a/chromium.org/dev/developers/design-documents/extensions/i18n-api

This CL only adds the getter of accept languages: 
chrome.i18n.getAcceptLanguages().

The setter of accept languages will be added in a separate CL.

BUG=http://crbug.com/14574
TEST=TEST=There is an extension in chrome\test\data\extensions\samples\i18n.
Load this extension. It creates a toolstrip button.  Click this button, you
should get chrome's accept languages.
Review URL: http://codereview.chromium.org/174116

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@25810 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 16 insertions, 0 deletions

diff --git a/chrome/renderer/extensions/extension_api_client_unittest.cc b/chrome/renderer/extensions/extension_api_client_unittest.cc
index 874f2bf..f248460 100644
--- a/chrome/renderer/extensions/extension_api_client_unittest.cc
+++ b/chrome/renderer/extensions/extension_api_client_unittest.cc
@@ -588,3 +588,19 @@ TEST_F(ExtensionAPIClientTest, CollapseToolstrip) {
                "Uncaught Error: Invalid value for argument 1. "
                "Expected 'function' but got 'integer'.");
 }
+
+// I18N API
+TEST_F(ExtensionAPIClientTest, GetAcceptLanguages) {
+  ExpectJsFail("chrome.i18n.getAcceptLanguages(32, function(){})",
+               "Uncaught Error: Too many arguments.");
+
+  ExpectJsFail("chrome.i18n.getAcceptLanguages()",
+               "Uncaught Error: Parameter 0 is required.");
+
+  ExpectJsFail("chrome.i18n.getAcceptLanguages('abc')",
+               "Uncaught Error: Invalid value for argument 0. "
+               "Expected 'function' but got 'string'.");
+
+  ExpectJsPass("chrome.i18n.getAcceptLanguages(function(){})",
+               "i18n.getAcceptLanguages", "null");
+}