Remove android_java_ui as it is not used

chrome/browser/net/net_error_tab_helper.h

Index: chrome/browser/net/net_error_tab_helper.h
diff --git a/chrome/browser/net/net_error_tab_helper.h b/chrome/browser/net/net_error_tab_helper.h
index 90ffc5279a37e37c77274b7a44e1215426635b1d..8f446ad02a07da95641bf004f1070c6f8119a1f3 100644
--- a/chrome/browser/net/net_error_tab_helper.h
+++ b/chrome/browser/net/net_error_tab_helper.h
@@ -78,9 +78,9 @@ class NetErrorTabHelper
     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>;
@@ -97,10 +97,10 @@ class NetErrorTabHelper
   // 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_;