Remove android_java_ui as it is not used

chrome/browser/android/devtools_manager_delegate_android.cc

Index: chrome/browser/android/devtools_manager_delegate_android.cc
diff --git a/chrome/browser/android/devtools_manager_delegate_android.cc b/chrome/browser/android/devtools_manager_delegate_android.cc
index d8a1a0a1d05e9080823447f4349d63fb4fd0a1f6..2f8a5f507e0fda4d039235791a5b32c8d75e4cc3 100644
--- a/chrome/browser/android/devtools_manager_delegate_android.cc
+++ b/chrome/browser/android/devtools_manager_delegate_android.cc
@@ -193,7 +193,7 @@ std::string DevToolsManagerDelegateAndroid::GetTargetTitle(
 
 bool DevToolsManagerDelegateAndroid::DiscoverTargets(
       const DevToolsAgentHost::DiscoveryCallback& callback) {
-#if BUILDFLAG(ANDROID_JAVA_UI)
+#if defined(OS_ANDROID)
   // Enumerate existing tabs, including the ones with no WebContents.
   DevToolsAgentHost::List result;
   std::set<WebContents*> tab_web_contents;
@@ -231,7 +231,7 @@ bool DevToolsManagerDelegateAndroid::DiscoverTargets(
   return true;
 #else
   return false;
-#endif  // BUILDFLAG(ANDROID_JAVA_UI)
+#endif  // defined(OS_ANDROID)
 }
 
 scoped_refptr<DevToolsAgentHost>