Revert of Introduce the Blink NotificationService, move permission checks there

content/renderer/mojo/blink_service_registry_impl.h

Index: content/renderer/mojo/blink_service_registry_impl.h
diff --git a/content/renderer/mojo/blink_service_registry_impl.h b/content/renderer/mojo/blink_service_registry_impl.h
index b731e9512c489180f6c3e94f39b850c507d2a43e..8bd86321e68d722c3f5cdf53fc739cb9f6ed9362 100644
--- a/content/renderer/mojo/blink_service_registry_impl.h
+++ b/content/renderer/mojo/blink_service_registry_impl.h
@@ -6,14 +6,9 @@
 #define CONTENT_RENDERER_MOJO_BLINK_SERVICE_REGISTRY_IMPL_H_
 
 #include "base/macros.h"
-#include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "mojo/public/cpp/system/message_pipe.h"
 #include "third_party/WebKit/public/platform/ServiceRegistry.h"
-
-namespace base {
-class SingleThreadTaskRunner;
-}
 
 namespace content {
 
@@ -34,10 +29,6 @@
  private:
   const base::WeakPtr<content::ServiceRegistry> service_registry_;
 
-  scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
-
-  base::WeakPtrFactory<BlinkServiceRegistryImpl> weak_ptr_factory_;
-
   DISALLOW_COPY_AND_ASSIGN(BlinkServiceRegistryImpl);
 };