Move DownloadControllerAndroid from content/ to chrome/

chrome/android/java/src/org/chromium/chrome/browser/download/SystemDownloadNotifier.java

 // 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.
 
 package org.chromium.chrome.browser.download;
 
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.ServiceConnection;
 import android.os.IBinder;
 
 import org.chromium.base.Log;
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.VisibleForTesting;
-import org.chromium.content.browser.DownloadInfo;
 
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
 import javax.annotation.Nullable;
 
 /**
  * DownloadNotifier implementation that creates and updates download notifications.
@@ skipping 263 matching lines @@
                         mBoundService.resumeAllPendingDownloads();
                         stopServiceIfNeeded();
                         break;
                     default:
                         assert false;
                 }
             }
         }
     }
 }