Make DownloadHistory observe manager, items

chrome/browser/history/download_database.h

Index: chrome/browser/history/download_database.h
diff --git a/chrome/browser/history/download_database.h b/chrome/browser/history/download_database.h
index 502610b169fc2b0b0877a188a1f2dbba21f55425..673948b75723a57d503b2e55b10a54d35917b713 100644
--- a/chrome/browser/history/download_database.h
+++ b/chrome/browser/history/download_database.h
@@ -54,14 +54,8 @@ class DownloadDatabase {
   // Create a new database entry for one download and return its primary db id.
   int64 CreateDownload(const content::DownloadPersistentStoreInfo& info);
 
-  // Remove a download from the database.
-  void RemoveDownload(DownloadID db_handle);
-
-  // Remove all completed downloads that started after |remove_begin|
-  // (inclusive) and before |remove_end|. You may use null Time values
-  // to do an unbounded delete in either direction. This function ignores
-  // all downloads that are in progress or are waiting to be cancelled.
-  bool RemoveDownloadsBetween(base::Time remove_begin, base::Time remove_end);
+  // Remove all |handles| from the database.
+  void RemoveDownloads(const std::set<int64>& handles);
 
  protected:
   // Returns the database for the functions in this interface.
@@ -78,9 +72,6 @@ class DownloadDatabase {
   bool DropDownloadTable();
 
  private:
-  // TODO(rdsmith): Remove after http://crbug.com/96627 has been resolved.
-  void CheckThread();
-
   bool EnsureColumnExists(const std::string& name, const std::string& type);
 
   bool owning_thread_set_;