Remove android_java_ui as it is not used

chrome/browser/io_thread.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_IO_THREAD_H_
 #define CHROME_BROWSER_IO_THREAD_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 20 matching lines @@
 #include "content/public/browser/browser_thread_delegate.h"
 #include "extensions/features/features.h"
 #include "net/base/network_change_notifier.h"
 #include "net/http/http_network_session.h"
 
 class PrefProxyConfigTracker;
 class PrefService;
 class PrefRegistrySimple;
 class SystemURLRequestContextGetter;
 
-#if BUILDFLAG(ANDROID_JAVA_UI)
+#if defined(OS_ANDROID)
 namespace chrome {
 namespace android {
 class ExternalDataUseObserver;
 }
 }
-#endif  // BUILDFLAG(ANDROID_JAVA_UI)
+#endif  // defined(OS_ANDROID)
 
 namespace base {
 class CommandLine;
 }
 
 namespace certificate_transparency {
 class TreeStateTracker;
 }
 
 namespace chrome_browser_net {
@@ skipping 73 matching lines @@
 
     Globals();
     ~Globals();
 
     // Ascribes all data use in Chrome to a source, such as page loads.
     std::unique_ptr<data_use_measurement::ChromeDataUseAscriber>
         data_use_ascriber;
     // Global aggregator of data use. It must outlive the
     // |system_network_delegate|.
     std::unique_ptr<data_usage::DataUseAggregator> data_use_aggregator;
-#if BUILDFLAG(ANDROID_JAVA_UI)
+#if defined(OS_ANDROID)
     // An external observer of data use.
     std::unique_ptr<chrome::android::ExternalDataUseObserver>
         external_data_use_observer;
-#endif  // BUILDFLAG(ANDROID_JAVA_UI)
+#endif  // defined(OS_ANDROID)
     // The "system" NetworkDelegate, used for Profile-agnostic network events.
     std::unique_ptr<net::NetworkDelegate> system_network_delegate;
     std::unique_ptr<net::HostResolver> host_resolver;
     std::unique_ptr<net::CertVerifier> cert_verifier;
     // The ChannelIDService must outlive the HttpTransactionFactory.
     std::unique_ptr<net::ChannelIDService> system_channel_id_service;
     // This TransportSecurityState doesn't load or save any state. It's only
     // used to enforce pinning for system requests and will only use built-in
     // pins.
     std::unique_ptr<net::TransportSecurityState> transport_security_state;
@@ skipping 242 matching lines @@
   bool http_09_on_non_default_ports_enabled_;
 
   const base::TimeTicks creation_time_;
 
   base::WeakPtrFactory<IOThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOThread);
 };
 
 #endif  // CHROME_BROWSER_IO_THREAD_H_