Remove android_java_ui as it is not used

chrome/browser/net/net_error_tab_helper.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_NET_NET_ERROR_TAB_HELPER_H_
 #define CHROME_BROWSER_NET_NET_ERROR_TAB_HELPER_H_
 
 #include <string>
 
 #include "base/bind.h"
@@ skipping 60 matching lines @@
 
   error_page::DnsProbeStatus dns_probe_status() const {
     return dns_probe_status_;
   }
 
   content::WebContentsFrameBindingSet<chrome::mojom::NetworkDiagnostics>&
   network_diagnostics_bindings_for_testing() {
     return network_diagnostics_bindings_;
   }
 
-#if BUILDFLAG(ANDROID_JAVA_UI)
+#if defined(OS_ANDROID)
   void DownloadPageLater();
-#endif  // BUILDFLAG(ANDROID_JAVA_UI)
+#endif  // defined(OS_ANDROID)
 
  private:
   friend class content::WebContentsUserData<NetErrorTabHelper>;
 
   void OnMainFrameDnsError();
 
   void InitializePref(content::WebContents* contents);
   bool ProbesAllowed() const;
 
   // chrome::mojom::NetworkDiagnostics:
   void RunNetworkDiagnostics(const GURL& url) override;
 
   // Shows the diagnostics dialog after its been sanitized, virtual for
   // testing.
   virtual void RunNetworkDiagnosticsHelper(const std::string& sanitized_url);
 
-#if BUILDFLAG(ANDROID_JAVA_UI)
+#if defined(OS_ANDROID)
   // Virtual for testing.
   virtual void DownloadPageLaterHelper(const GURL& url);
-#endif  // BUILDFLAG(ANDROID_JAVA_UI)
+#endif  // defined(OS_ANDROID)
 
   content::WebContentsFrameBindingSet<chrome::mojom::NetworkDiagnostics>
       network_diagnostics_bindings_;
 
   // True if the last provisional load that started was for an error page.
   bool is_error_page_;
 
   // True if the helper has seen a main frame page load fail with a DNS error,
   // but has not yet seen a new page commit successfully afterwards.
   bool dns_error_active_;
@@ skipping 15 matching lines @@
   BooleanPrefMember resolve_errors_with_web_service_;
 
   base::WeakPtrFactory<NetErrorTabHelper> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NetErrorTabHelper);
 };
 
 }  // namespace chrome_browser_net
 
 #endif  // CHROME_BROWSER_NET_NET_ERROR_TAB_HELPER_H_