Functionality has been requested in the Extension API for Javascript to...

chrome/renderer/resources/extension_process_bindings.js

Index: chrome/renderer/resources/extension_process_bindings.js
===================================================================
--- chrome/renderer/resources/extension_process_bindings.js	(revision 20805)
+++ chrome/renderer/resources/extension_process_bindings.js	(working copy)
@@ -27,6 +27,7 @@
   native function UpdateTab();
   native function MoveTab();
   native function RemoveTab();
+  native function GetVisibleTabCapture();
   native function GetTabLanguage();
   native function EnablePageAction();
   native function DisablePageAction();
@@ -318,6 +319,16 @@
     chrome.types.optFun
   ];
 
+  chrome.tabs.getVisibleTabCapture = function(windowId, callback) {

[Aaron Boodman, 2009/07/30 18:15:12]

Shouldn't this be in api.json now?

[Aaron Boodman, 2009/07/30 18:15:12]

Can we change the name to captureVisibleTab()?

+    validate(arguments, arguments.callee.params);
+    sendRequest(GetVisibleTabCapture, windowId, callback);
+  };
+
+  chrome.tabs.getVisibleTabCapture.params = [
+    chrome.types.optPInt,
+    chrome.types.fun
+  ];
+
   chrome.tabs.getLanguage = function(tabId, callback) {
     validate(arguments, arguments.callee.params);
     sendRequest(GetTabLanguage, tabId, callback);