Remove android_java_ui as it is not used

chrome/browser/media/router/media_router_dialog_controller_unittest.cc

 // Copyright 2016 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 <memory>
 #include <vector>
 
 #include "chrome/browser/media/router/create_presentation_connection_request.h"
 #include "chrome/browser/media/router/media_router_dialog_controller.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 64 matching lines @@
             base::Bind(&MediaRouterDialogControllerTest::RequestSuccess,
                        base::Unretained(this)),
             base::Bind(&MediaRouterDialogControllerTest::RequestError,
                        base::Unretained(this))));
   }
 
   std::unique_ptr<TestMediaRouterDialogController> dialog_controller_;
   std::unique_ptr<MockWebContentsDelegate> web_contents_delegate_;
 };
 
-#if BUILDFLAG(ANDROID_JAVA_UI)
+#if defined(OS_ANDROID)
 // The non-Android implementation is tested in
 // MediaRouterDialogControllerImplTest.
 TEST_F(MediaRouterDialogControllerTest, CreateForWebContents) {
   MediaRouterDialogController* dialog_controller =
       MediaRouterDialogController::GetOrCreateForWebContents(web_contents());
   ASSERT_NE(dialog_controller, nullptr);
 }
 #endif
 
 TEST_F(MediaRouterDialogControllerTest, ShowAndHideDialog) {
@@ skipping 21 matching lines @@
   EXPECT_TRUE(dialog_controller_->IsShowingMediaRouterDialog());
 
   // If a dialog is already shown, ShowMediaRouterDialogForPresentation() should
   // return false.
   EXPECT_CALL(*web_contents_delegate_, ActivateContents(web_contents()));
   EXPECT_FALSE(
       dialog_controller_->ShowMediaRouterDialogForPresentation(GetRequest()));
 }
 
 }  // namespace media_router