Prevent extensions from moving tabs between profiles.

chrome/test/data/extensions/api_test/incognito/apis/background.html

 <script>
 var normalWindow, normalTab;
 var incognitoWindow, incognitoTab;
 
 var pass = chrome.test.callbackPass;
+var fail = chrome.test.callbackFail;
 var assertEq = chrome.test.assertEq;
 var assertTrue = chrome.test.assertTrue;
 
 chrome.test.getConfig(function(config) {
   chrome.test.runTests([
     function setupWindows() {
       // The test harness should have set us up with 2 windows: 1 incognito
       // and 1 regular. Verify that we can see both when we ask for it.
       chrome.windows.getAll({populate: true}, pass(function(windows) {
         assertEq(2, windows.length);
@@ skipping 84 matching lines @@
         pass(function(tab) {
           chrome.tabs.executeScript(tab.id,
             {code: 'document.title = chrome.extension.inIncognitoContext'},
             pass(function() {
               assertEq(undefined, chrome.extension.lastError);
               chrome.tabs.get(tab.id, pass(function(tab) {
                   assertEq("false", tab.title);
                 }));
             }));
         }));
+    },
+
+    // Tests that extensions can't move tabs between incognito and
+    // non-incognito windows.
+    function moveTabBetweenProfiles() {
+      var errorMsg = "Tabs can only be moved between " +
+                       "windows in the same profile.";
+
+      // Create a tab in the non-incognito window...
+      chrome.tabs.create({windowId: normalWindow.id, url: 'about:blank'},
+        pass(function(tab) {
+          // ... and then try to move it to the incognito window.
+          chrome.tabs.move(tab.id,
+            {windowId: incognitoWindow.id, index: 0}, fail(errorMsg));
+        }));
     }
   ]);
 });
 
 </script>