Add getLanguage function to tab extension.

BUG=none
TEST=enable extensions using the toolstip.html code (added with this CL) and load pages in different languages. The corresponding language should appear in the bottom left after the page is loadedm or when the button is clicked, or when you navigate back to that tab after visiting some other tab.
Review URL: http://codereview.chromium.org/150062

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@20378 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 11 insertions, 0 deletions

diff --git a/chrome/renderer/resources/extension_process_bindings.js b/chrome/renderer/resources/extension_process_bindings.js
index f3893fb..51756d0 100644
--- a/chrome/renderer/resources/extension_process_bindings.js
+++ b/chrome/renderer/resources/extension_process_bindings.js
@@ -24,6 +24,7 @@ var chrome = chrome || {};
   native function UpdateTab();
   native function MoveTab();
   native function RemoveTab();
+  native function GetTabLanguage();
   native function EnablePageAction();
   native function DisablePageAction();
   native function GetBookmarks();
@@ -313,6 +314,16 @@ var chrome = chrome || {};
     chrome.types.optFun
   ];
 
+  chrome.tabs.getLanguage = function(tabId, callback) {
+    validate(arguments, arguments.callee.params);
+    sendRequest(GetTabLanguage, tabId, callback);
+  };
+
+  chrome.tabs.getLanguage.params = [
+    chrome.types.optPInt,
+    chrome.types.optFun
+  ];
+
   // Sends ({Tab}).
   // Will *NOT* be followed by tab-attached - it is implied.
   // *MAY* be followed by tab-selection-changed.