Move DownloadControllerAndroid from content/ to chrome/

chrome/browser/android/download/mock_download_controller_android.cc

 // Copyright (c) 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/mock_download_controller_android.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/threading/thread_task_runner_handle.h"
 
-using content::DownloadControllerAndroid;
-
 namespace chrome {
 namespace android {
 
 MockDownloadControllerAndroid::MockDownloadControllerAndroid()
     : approve_file_access_request_(true) {
 }
 
 MockDownloadControllerAndroid::~MockDownloadControllerAndroid() {}
 
 void MockDownloadControllerAndroid::CreateGETDownload(
@@ skipping 23 matching lines @@
       FROM_HERE, base::Bind(cb, approve_file_access_request_));
 }
 
 void MockDownloadControllerAndroid::SetApproveFileAccessRequestForTesting(
     bool approve) {
   approve_file_access_request_ = approve;
 }
 
 }  // namespace android
 }  // namespace chrome