Reland DownloadItem::Observer::OnDownloadDestroyed() replaces DownloadItem::REMOVING

chrome/browser/history/download_database.cc

 // Copyright (c) 2012 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/history/download_database.h"
 
 #include <limits>
 #include <string>
 #include <vector>
 
@@ skipping 38 matching lines @@
 static const int kStateComplete = 1;
 static const int kStateCancelled = 2;
 static const int kStateBug140687 = 3;
 static const int kStateInterrupted = 4;
 
 int StateToInt(DownloadItem::DownloadState state) {
   switch (state) {
     case DownloadItem::IN_PROGRESS: return kStateInProgress;
     case DownloadItem::COMPLETE: return kStateComplete;
     case DownloadItem::CANCELLED: return kStateCancelled;
-    case DownloadItem::REMOVING: return kStateInvalid;
     case DownloadItem::INTERRUPTED: return kStateInterrupted;
     case DownloadItem::MAX_DOWNLOAD_STATE: return kStateInvalid;
     default: return kStateInvalid;
   }
 }
 
 DownloadItem::DownloadState IntToState(int state) {
   switch (state) {
     case kStateInProgress: return DownloadItem::IN_PROGRESS;
     case kStateComplete: return DownloadItem::COMPLETE;
@@ skipping 271 matching lines @@
     if (num_downloads_deleted > 0) {
       UMA_HISTOGRAM_TIMES("Download.DatabaseRemoveDownloadsTimePerRecord",
                           (1000 * micros) / num_downloads_deleted);
     }
   }
 
   return success;
 }
 
 }  // namespace history