[Mac] Bounce app shims when app windows request attention.

apps/app_shim/app_shim_host_mac.cc

 // Copyright 2013 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 "apps/app_shim/app_shim_host_mac.h"
 
 #include "apps/app_shim/app_shim_handler_mac.h"
 #include "apps/app_shim/app_shim_messages.h"
 #include "base/bind.h"
 #include "base/files/file_path.h"
@@ skipping 102 matching lines @@
 }
 
 void AppShimHost::OnAppClosed() {
   Close();
 }
 
 void AppShimHost::OnAppHide() {
   Send(new AppShimMsg_Hide);
 }
 
-void AppShimHost::OnAppRequestUserAttention() {
-  Send(new AppShimMsg_RequestUserAttention);
+void AppShimHost::OnAppRequestUserAttention(apps::AppShimAttentionType type) {
+  Send(new AppShimMsg_RequestUserAttention(type));
 }
 
 void AppShimHost::Close() {
   DCHECK(CalledOnValidThread());
   delete this;
 }