[Downloads] Add support for tracking incomplete downloads

chrome/browser/android/download/download_manager_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_ANDROID_DOWNLOAD_DOWNLOAD_MANAGER_SERVICE_H_
 #define CHROME_BROWSER_ANDROID_DOWNLOAD_DOWNLOAD_MANAGER_SERVICE_H_
 
 #include <jni.h>
 #include <map>
 #include <string>
@@ skipping 80 matching lines @@
                                           const JavaParamRef<jobject>& obj,
                                           bool is_off_the_record);
 
   // Remove download items associated with |path| from downloads history.
   void RemoveDownloadsForPath(const base::FilePath& path);
 
   // DownloadHistory::Observer methods.
   void OnHistoryQueryComplete() override;
 
   // AllDownloadItemNotifier::Observer methods.
+  void OnDownloadCreated(content::DownloadManager* manager,
+                         content::DownloadItem* item) override;
   void OnDownloadUpdated(content::DownloadManager* manager,
                          content::DownloadItem* item) override;
   void OnDownloadRemoved(content::DownloadManager* manager,
                          content::DownloadItem* item) override;
 
  protected:
   // Called to get the content::DownloadManager instance.
   virtual content::DownloadManager* GetDownloadManager(bool is_off_the_record);
 
  private:
@@ skipping 57 matching lines @@
 
   ResumeCallback resume_callback_for_testing_;
 
   std::unique_ptr<AllDownloadItemNotifier> original_notifier_;
   std::unique_ptr<AllDownloadItemNotifier> off_the_record_notifier_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadManagerService);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_DOWNLOAD_DOWNLOAD_MANAGER_SERVICE_H_