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

chrome/browser/chromeos/gdata/gdata_download_observer.cc

Index: chrome/browser/chromeos/gdata/gdata_download_observer.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_download_observer.cc b/chrome/browser/chromeos/gdata/gdata_download_observer.cc
index d3989fdf569d4a26dbebf7a144cbd4790f55cafb..ec7623bd99f8d99a60bac6b948c51c0ea9d7026a 100644
--- a/chrome/browser/chromeos/gdata/gdata_download_observer.cc
+++ b/chrome/browser/chromeos/gdata/gdata_download_observer.cc
@@ -358,7 +358,6 @@ void GDataDownloadObserver::OnDownloadUpdated(DownloadItem* download) {
 
     // TODO(achuith): Stop the pending upload and delete the file.
     case DownloadItem::CANCELLED:
-    case DownloadItem::REMOVING:
     case DownloadItem::INTERRUPTED:
       RemovePendingDownload(download);
       break;
@@ -369,6 +368,10 @@ void GDataDownloadObserver::OnDownloadUpdated(DownloadItem* download) {
   DVLOG(1) << "Number of pending downloads=" << pending_downloads_.size();
 }
 
+void GDataDownloadObserver::OnDownloadDestructed(DownloadItem* download) {
+  RemovePendingDownload(download);
+}
+
 void GDataDownloadObserver::AddPendingDownload(DownloadItem* download) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));