Add logging for slow device events, limit network UI update rate

ui/chromeos/network/network_list.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 UI_CHROMEOS_NETWORK_NETWORK_LIST_H_
 #define UI_CHROMEOS_NETWORK_NETWORK_LIST_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 26 matching lines @@
   // Returns whether |view| is a View that represents a network in the list.
   // |service_path| is set to the service-path of the network if this returns
   // true, and remains unchanged if this returns false.
   bool IsViewInList(views::View* view, std::string* service_path) const;
 
   void set_content_view(views::View* content) { content_ = content; }
 
  private:
   void UpdateNetworks(
       const chromeos::NetworkStateHandler::NetworkStateList& networks);
+  void UpdateNetworkIcons();
   void UpdateNetworkListInternal();
+  void HandleRelayout();
   bool UpdateNetworkListEntries(std::set<std::string>* new_service_paths);
+  bool UpdateNetworkChildren(std::set<std::string>* new_service_paths,
+                             int* child_index,
+                             bool highlighted);
   bool UpdateNetworkChild(int index, const NetworkInfo* info);
   bool PlaceViewAtIndex(views::View* view, int index);
   bool UpdateInfoLabel(int message_id, int index, views::Label** label);
 
   // network_icon::AnimationObserver:
   virtual void NetworkIconChanged() override;
 
   NetworkListDelegate* delegate_;
   views::View* content_;
 
@@ skipping 10 matching lines @@
   // A map of network service paths to their view.
   typedef std::map<std::string, views::View*> ServicePathMap;
   ServicePathMap service_path_map_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkListView);
 };
 
 }  // namespace ui
 
 #endif  // UI_CHROMEOS_NETWORK_NETWORK_LIST_H_