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

chrome/browser/android/download/download_manager_service_unittest.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/download/download_manager_service.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/bind.h"
 #include "base/macros.h"
@@ skipping 12 matching lines @@
 
 namespace content {
 class BrowserContext;
 class ByteStreamReader;
 class DownloadManagerDelegate;
 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));
   }
 
   void CreateDownloadItem(bool can_resume) {
     download_.reset(new content::MockDownloadItem());
     ON_CALL(*download_, CanResume()).WillByDefault(
         ::testing::Return(can_resume));
   }
@@ skipping 57 matching lines @@
   StartDownload("0000");
   EXPECT_TRUE(success_);
 }
 
 // Test that resumption fails if the target download item is not resumable.
 TEST_F(DownloadManagerServiceTest, ResumptionWithNonResumableItem) {
   service_->CreateDownloadItem(false);
   StartDownload("0000");
   EXPECT_FALSE(success_);
 }