Add support for a "split" incognito behavior for extensions.

chrome/renderer/resources/renderer_extension_bindings.js

 // Copyright (c) 2009 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.
 
 // This script contains unprivileged javascript APIs related to chrome
 // extensions.  It is loaded by any extension-related context, such as content
 // scripts or toolstrips.
 // See user_script_slave.cc for script that is loaded by content scripts only.
 // TODO(mpcomplete): we also load this in regular web pages, but don't need
 // to.
@@ skipping 125 matching lines @@
 
   // Disconnects the port from the other end.
   chrome.Port.prototype.disconnect = function() {
     delete ports[this.portId_];
     CloseChannel(this.portId_);
   }
 
   // This function is called on context initialization for both content scripts
   // and extension contexts.
   chrome.initExtension = function(extensionId, warnOnPrivilegedApiAccess,
-                                  inIncognitoTab) {
+                                  inIncognitoContext) {
     delete chrome.initExtension;
     chromeHidden.extensionId = extensionId;
 
     chrome.extension = chrome.extension || {};
     chrome.self = chrome.extension;
 
-    chrome.extension.inIncognitoTab = inIncognitoTab;
+    chrome.extension.inIncognitoTab = inIncognitoContext;  // deprecated
+    chrome.extension.inIncognitoContext = inIncognitoContext;
 
     // Events for when a message channel is opened to our extension.
     chrome.extension.onConnect = new chrome.Event();
     chrome.extension.onConnectExternal = new chrome.Event();
     chrome.extension.onRequest = new chrome.Event();
     chrome.extension.onRequestExternal = new chrome.Event();
 
     // Opens a message channel to the given target extension, or the current one
     // if unspecified.  Returns a Port for message passing.
     chrome.extension.connect = function(targetId_opt, connectInfo_opt) {
@@ skipping 121 matching lines @@
       "extension.onConnectExternal",
       "extension.onRequestExternal",
       "i18n.getAcceptLanguages"
     ];
     for (var i = 0; i < privileged.length; i++) {
       createStub(privileged[i]);
     }
   }
 
 })();