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

chrome/browser/extensions/extension_messages_apitest.cc

Index: chrome/browser/extensions/extension_messages_apitest.cc
diff --git a/chrome/browser/extensions/extension_messages_apitest.cc b/chrome/browser/extensions/extension_messages_apitest.cc
index 9a393c64895044bb088b1d073df15d8a2d3b1255..533b8402e4f383978be5627d93581617b5735128 100644
--- a/chrome/browser/extensions/extension_messages_apitest.cc
+++ b/chrome/browser/extensions/extension_messages_apitest.cc
@@ -28,19 +28,19 @@ class MessageSender : public NotificationObserver {
     // from the origin http://b.com/ are supposed to arrive.
     message_service->DispatchEventToRenderers("test.onMessage",
         "[{\"lastMessage\":false,\"data\":\"no restriction\"}]",
-        Source<Profile>(source).ptr()->IsOffTheRecord(),
+        Source<Profile>(source).ptr(),
         GURL());
     message_service->DispatchEventToRenderers("test.onMessage",
         "[{\"lastMessage\":false,\"data\":\"http://a.com/\"}]",
-        Source<Profile>(source).ptr()->IsOffTheRecord(),
+        Source<Profile>(source).ptr(),
         GURL("http://a.com/"));
     message_service->DispatchEventToRenderers("test.onMessage",
         "[{\"lastMessage\":false,\"data\":\"http://b.com/\"}]",
-        Source<Profile>(source).ptr()->IsOffTheRecord(),
+        Source<Profile>(source).ptr(),
         GURL("http://b.com/"));
     message_service->DispatchEventToRenderers("test.onMessage",
         "[{\"lastMessage\":true,\"data\":\"last message\"}]",
-        Source<Profile>(source).ptr()->IsOffTheRecord(),
+        Source<Profile>(source).ptr(),
         GURL());
   }