Remove android_java_ui as it is not used

chrome/browser/android/devtools_manager_delegate_android.cc

 // Copyright 2015 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.
 
 #include "chrome/browser/android/devtools_manager_delegate_android.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 175 matching lines @@
 std::string DevToolsManagerDelegateAndroid::GetTargetTitle(
     content::RenderFrameHost* host) {
   content::WebContents* web_contents =
       content::WebContents::FromRenderFrameHost(host);
   TabAndroid* tab = TabAndroid::FromWebContents(web_contents);
   return tab ? base::UTF16ToUTF8(tab->GetTitle()) : "";
 }
 
 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;
   for (TabModelList::const_iterator iter = TabModelList::begin();
       iter != TabModelList::end(); ++iter) {
     TabModel* model = *iter;
     for (int i = 0; i < model->GetTabCount(); ++i) {
       TabAndroid* tab = model->GetTabAt(i);
       if (!tab)
         continue;
@@ skipping 17 matching lines @@
       if (tab_web_contents.find(web_contents) != tab_web_contents.end())
         continue;
     }
     result.push_back(*it);
   }
 
   callback.Run(std::move(result));
   return true;
 #else
   return false;
-#endif  // BUILDFLAG(ANDROID_JAVA_UI)
+#endif  // defined(OS_ANDROID)
 }
 
 scoped_refptr<DevToolsAgentHost>
 DevToolsManagerDelegateAndroid::CreateNewTarget(const GURL& url) {
   if (TabModelList::empty())
     return nullptr;
 
   TabModel* tab_model = TabModelList::get(0);
   if (!tab_model)
     return nullptr;
@@ skipping 18 matching lines @@
 
 void DevToolsManagerDelegateAndroid::DevToolsAgentHostAttached(
     content::DevToolsAgentHost* agent_host) {
   network_protocol_handler_->DevToolsAgentStateChanged(agent_host, true);
 }
 
 void DevToolsManagerDelegateAndroid::DevToolsAgentHostDetached(
     content::DevToolsAgentHost* agent_host) {
   network_protocol_handler_->DevToolsAgentStateChanged(agent_host, false);
 }