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

chrome/browser/extensions/extension_history_api.cc

Index: chrome/browser/extensions/extension_history_api.cc
diff --git a/chrome/browser/extensions/extension_history_api.cc b/chrome/browser/extensions/extension_history_api.cc
index 3df05091b8bf74c2391b86ba17a44d32868a2f91..82be3dc25520467bd0d9707ffe6c4699e48505bf 100644
--- a/chrome/browser/extensions/extension_history_api.cc
+++ b/chrome/browser/extensions/extension_history_api.cc
@@ -143,7 +143,7 @@ void ExtensionHistoryEventRouter::DispatchEvent(Profile* profile,
                                                 const std::string& json_args) {
   if (profile && profile->GetExtensionMessageService()) {
     profile->GetExtensionMessageService()->DispatchEventToRenderers(
-        event_name, json_args, profile->IsOffTheRecord(), GURL());
+        event_name, json_args, profile, GURL());
   }
 }