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

chrome/browser/extensions/extension_protocols.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/browser/extensions/extension_protocols.h"
 
 #include <algorithm>
 
 #include "app/resource_bundle.h"
 #include "base/file_path.h"
@@ skipping 81 matching lines @@
   if (context->ExtensionHasWebExtent(request->url().host())) {
     LOG(ERROR) << "Denying load of " << request->url().spec() << " from "
                << "hosted app.";
     return false;
   }
 
   // Don't allow toplevel navigations to extension resources in incognito mode.
   // This is because an extension must run in a single process, and an
   // incognito tab prevents that.
   if (context->is_off_the_record() &&
-      info->resource_type() == ResourceType::MAIN_FRAME) {
+      info->resource_type() == ResourceType::MAIN_FRAME &&
+      !context->ExtensionCanLoadInIncognito(request->url().host())) {
     LOG(ERROR) << "Denying load of " << request->url().spec() << " from "
                << "incognito tab.";
     return false;
   }
 
   // Otherwise, pages are allowed to load resources from extensions if the
   // extension has host permissions to (and therefore could be running script
   // in, which might need access to the extension resources).
   //
   // Exceptions are:
@@ skipping 87 matching lines @@
 
   return new URLRequestFileJob(request, resource.GetFilePath());
 }
 
 void RegisterExtensionProtocols() {
   URLRequest::RegisterProtocolFactory(chrome::kExtensionScheme,
                                       &CreateExtensionURLRequestJob);
   URLRequest::RegisterProtocolFactory(chrome::kUserScriptScheme,
                                       &CreateUserScriptURLRequestJob);
 }