Ask download manager to remove a download if it is overwritten by another

chrome/browser/android/download/download_manager_service_unittest.cc

Index: chrome/browser/android/download/download_manager_service_unittest.cc
diff --git a/chrome/browser/android/download/download_manager_service_unittest.cc b/chrome/browser/android/download/download_manager_service_unittest.cc
index e42e40dbcad17918af161640d57b0011fea913ea..bccba3745b9dff1333820e427ed1e076c108bec3 100644
--- a/chrome/browser/android/download/download_manager_service_unittest.cc
+++ b/chrome/browser/android/download/download_manager_service_unittest.cc
@@ -30,8 +30,7 @@ struct DownloadCreateInfo;
 
 class MockDownloadManagerService : public DownloadManagerService {
  public:
-  MockDownloadManagerService()
-     : DownloadManagerService(base::android::AttachCurrentThread(), nullptr) {
+  MockDownloadManagerService() : DownloadManagerService() {
     ON_CALL(manager_, GetDownloadByGuid(_)).WillByDefault(
         ::testing::Invoke(this,
                           &MockDownloadManagerService::GetDownloadByGuid));