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

chrome/browser/devtools/devtools_window.h

Index: chrome/browser/devtools/devtools_window.h
diff --git a/chrome/browser/devtools/devtools_window.h b/chrome/browser/devtools/devtools_window.h
index ca3e0ef4e4253b3b31f91bf32069066ead70c58c..9e8ca3e07030364bc9899f61efe780e52a5035bb 100644
--- a/chrome/browser/devtools/devtools_window.h
+++ b/chrome/browser/devtools/devtools_window.h
@@ -246,8 +246,7 @@
     kFrontendNode
   };
 
-  DevToolsWindow(FrontendType frontend_type,
-                 Profile* profile,
+  DevToolsWindow(Profile* profile,
                  content::WebContents* main_web_contents,
                  DevToolsUIBindings* bindings,
                  content::WebContents* inspected_web_contents,
@@ -348,7 +347,6 @@
 
   std::unique_ptr<ObserverWithAccessor> inspected_contents_observer_;
 
-  FrontendType frontend_type_;
   Profile* profile_;
   content::WebContents* main_web_contents_;
   content::WebContents* toolbox_web_contents_;