[DevTools] Show icon in top toolbar when Node target is available

chrome/browser/devtools/devtools_window.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_DEVTOOLS_DEVTOOLS_WINDOW_H_
 #define CHROME_BROWSER_DEVTOOLS_DEVTOOLS_WINDOW_H_
 
 #include "base/macros.h"
 #include "chrome/browser/devtools/devtools_contents_resizing_strategy.h"
 #include "chrome/browser/devtools/devtools_toggle_action.h"
@@ skipping 228 matching lines @@
   };
 
   enum FrontendType {
     kFrontendDefault,
     kFrontendRemote,
     kFrontendWorker,
     kFrontendV8,
     kFrontendNode
   };
 
-  DevToolsWindow(Profile* profile,
+  DevToolsWindow(FrontendType frontend_type,
+                 Profile* profile,
                  content::WebContents* main_web_contents,
                  DevToolsUIBindings* bindings,
                  content::WebContents* inspected_web_contents,
                  bool can_dock);
 
   // External frontend is always undocked.
   static void OpenExternalFrontend(
       Profile* profile,
       const std::string& frontend_uri,
       const scoped_refptr<content::DevToolsAgentHost>& agent_host,
@@ skipping 80 matching lines @@
   BrowserWindow* GetInspectedBrowserWindow();
   void ScheduleShow(const DevToolsToggleAction& action);
   void Show(const DevToolsToggleAction& action);
   void DoAction(const DevToolsToggleAction& action);
   void LoadCompleted();
   void UpdateBrowserToolbar();
   void UpdateBrowserWindow();
 
   std::unique_ptr<ObserverWithAccessor> inspected_contents_observer_;
 
+  FrontendType frontend_type_;
   Profile* profile_;
   content::WebContents* main_web_contents_;
   content::WebContents* toolbox_web_contents_;
   DevToolsUIBindings* bindings_;
   Browser* browser_;
   bool is_docked_;
   const bool can_dock_;
   bool close_on_detach_;
   LifeStage life_stage_;
   DevToolsToggleAction action_on_load_;
   DevToolsContentsResizingStrategy contents_resizing_strategy_;
   // True if we're in the process of handling a beforeunload event originating
   // from the inspected webcontents, see InterceptPageBeforeUnload for details.
   bool intercepted_page_beforeunload_;
   base::Closure load_completed_callback_;
   base::Closure close_callback_;
   bool ready_for_test_;
   base::Closure ready_for_test_callback_;
 
   base::TimeTicks inspect_element_start_time_;
   std::unique_ptr<DevToolsEventForwarder> event_forwarder_;
   std::unique_ptr<DevToolsEyeDropper> eye_dropper_;
 
   friend class DevToolsEventForwarder;
   DISALLOW_COPY_AND_ASSIGN(DevToolsWindow);
 };
 
 #endif  // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_WINDOW_H_