Cleans up usage of ViewManagerServiceImpl::roots_

mojo/services/public/cpp/view_manager/node.h

 // 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.
 
 #ifndef MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_NODE_H_
 #define MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_NODE_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 63 matching lines @@
   // Embedding.
   void Embed(const String& url);
 
  protected:
   // This class is subclassed only by test classes that provide a public ctor.
   Node();
   ~Node();
 
  private:
   friend class NodePrivate;
+  friend class ViewManagerClientImpl;
 
   explicit Node(ViewManager* manager);
 
   void LocalDestroy();
   void LocalAddChild(Node* child);
   void LocalRemoveChild(Node* child);
   // Returns true if the order actually changed.
   bool LocalReorder(Node* relative, OrderDirection direction);
   void LocalSetActiveView(View* view);
   void LocalSetBounds(const gfx::Rect& old_bounds, const gfx::Rect& new_bounds);
 
   ViewManager* manager_;
   Id id_;
   Node* parent_;
   Children children_;
 
   ObserverList<NodeObserver> observers_;
 
   gfx::Rect bounds_;
   View* active_view_;
 
   DISALLOW_COPY_AND_ASSIGN(Node);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_NODE_H_