Add UI DevTools under chrome://inspect/#other

chrome/browser/ui/webui/inspect_ui.h

 // Copyright (c) 2012 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 CHROME_BROWSER_UI_WEBUI_INSPECT_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_INSPECT_UI_H_
 
 #include <map>
 #include <memory>
 
@@ skipping 65 matching lines @@
 
   DevToolsTargetsUIHandler* FindTargetHandler(
       const std::string& source_id);
   scoped_refptr<content::DevToolsAgentHost> FindTarget(
       const std::string& source_id,
       const std::string& target_id);
 
   void PopulateTargets(const std::string& source_id,
                        const base::ListValue& targets);
 
+  void PopulateAdditionalTargets(const base::ListValue& targets);
+
   void ForceUpdateIfNeeded(const std::string& source_id,
                            const std::string& target_type);
 
   void PopulatePortStatus(const base::Value& status);
 
   void ShowIncognitoWarning();
 
   // A scoped container for notification registries.
   content::NotificationRegistrar notification_registrar_;
 
   // A scoped container for preference change registries.
   PrefChangeRegistrar pref_change_registrar_;
 
   std::map<std::string, std::unique_ptr<DevToolsTargetsUIHandler>>
       target_handlers_;
 
   std::unique_ptr<PortForwardingStatusSerializer> port_status_serializer_;
 
   DISALLOW_COPY_AND_ASSIGN(InspectUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_INSPECT_UI_H_