Remove the MessageLoop::DestructionObserver from mojo bindings.

chrome/browser/media/router/presentation_service_delegate_observers.cc

Index: chrome/browser/media/router/presentation_service_delegate_observers.cc
diff --git a/chrome/browser/media/router/presentation_service_delegate_observers.cc b/chrome/browser/media/router/presentation_service_delegate_observers.cc
index 48595382a5c9e71f7d9133b4ecc9818b5556b5cd..4875794be5acf533b8de2b8f880032812c16e9f9 100644
--- a/chrome/browser/media/router/presentation_service_delegate_observers.cc
+++ b/chrome/browser/media/router/presentation_service_delegate_observers.cc
@@ -1,8 +1,11 @@
 // Copyright 2016 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/media/router/presentation_service_delegate_observers.h"
 
+#include "base/stl_util.h"
+
 namespace media_router {
 
 PresentationServiceDelegateObservers::PresentationServiceDelegateObservers() {}