Makes WindowTree take the AccessPolicy

components/mus/ws/default_access_policy.cc

 // Copyright 2014 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 "components/mus/ws/default_access_policy.h"
 
 #include "components/mus/ws/access_policy_delegate.h"
 #include "components/mus/ws/server_window.h"
 
 namespace mus {
 namespace ws {
 
-DefaultAccessPolicy::DefaultAccessPolicy(ConnectionSpecificId connection_id,
-                                         AccessPolicyDelegate* delegate)
-    : connection_id_(connection_id), delegate_(delegate) {}
+DefaultAccessPolicy::DefaultAccessPolicy() {}
 
 DefaultAccessPolicy::~DefaultAccessPolicy() {}
 
+void DefaultAccessPolicy::Init(ConnectionSpecificId connection_id,
+                               AccessPolicyDelegate* delegate) {
+  connection_id_ = connection_id;
+  delegate_ = delegate;
+}
+
 bool DefaultAccessPolicy::CanRemoveWindowFromParent(
     const ServerWindow* window) const {
   if (!WasCreatedByThisConnection(window))
     return false;  // Can only unparent windows we created.
 
   return delegate_->HasRootForAccessPolicy(window->parent()) ||
          WasCreatedByThisConnection(window->parent());
 }
 
 bool DefaultAccessPolicy::CanAddWindow(const ServerWindow* parent,
@@ skipping 150 matching lines @@
 bool DefaultAccessPolicy::IsValidIdForNewWindow(
     const ClientWindowId& id) const {
   // Clients using DefaultAccessPolicy only see windows they have created (for
   // the embed point they choose the id), so it's ok for clients to use whatever
   // id they want.
   return true;
 }
 
 }  // namespace ws
 }  // namespace mus