Makes the response to CheckNotificationPermission asynchronous.

content/browser/renderer_host/render_message_filter.h

Index: content/browser/renderer_host/render_message_filter.h
diff --git a/content/browser/renderer_host/render_message_filter.h b/content/browser/renderer_host/render_message_filter.h
index 4eb986471c936aeedabe1d0d33e83f5323415d89..e39ee048dfd3188139c0614b59d0ca08966024ff 100644
--- a/content/browser/renderer_host/render_message_filter.h
+++ b/content/browser/renderer_host/render_message_filter.h
@@ -26,6 +26,7 @@
 #include "media/base/channel_layout.h"
 #include "net/cookies/canonical_cookie.h"
 #include "third_party/WebKit/public/web/WebPopupType.h"
+#include "third_party/WebKit/public/web/WebNotificationPresenter.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/surface/transport_dib.h"
 
@@ -190,8 +191,9 @@ class RenderMessageFilter : public BrowserMessageFilter {
                      const GURL& url,
                      const Referrer& referrer,
                      const string16& suggested_name);
+
   void OnCheckNotificationPermission(const GURL& source_origin,
-                                     int* permission_level);
+                                     IPC::Message* reply_msg);
 
   void OnGetCPUUsage(int* cpu_usage);