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

chrome/browser/ui/webui/downloads_dom_handler.cc

Index: chrome/browser/ui/webui/downloads_dom_handler.cc
diff --git a/chrome/browser/ui/webui/downloads_dom_handler.cc b/chrome/browser/ui/webui/downloads_dom_handler.cc
index d10d8e6ea3e21058cda65ae2a1fa6bccf9425349..7841676f0960073e9cb74f5aaa905e3d7a098e84 100644
--- a/chrome/browser/ui/webui/downloads_dom_handler.cc
+++ b/chrome/browser/ui/webui/downloads_dom_handler.cc
@@ -179,14 +179,6 @@ void DownloadsDOMHandler::OnDownloadUpdated(content::DownloadItem* download) {
   if (it == download_items_.end())
     return;
 
-  if (download->GetState() == content::DownloadItem::REMOVING) {
-    (*it)->RemoveObserver(this);
-    *it = NULL;
-    // A later ModelChanged() notification will change the WebUI's
-    // view of the downloads list.
-    return;
-  }
-
   const int id = static_cast<int>(it - download_items_.begin());
 
   ListValue results_value;
@@ -194,6 +186,17 @@ void DownloadsDOMHandler::OnDownloadUpdated(content::DownloadItem* download) {
   web_ui()->CallJavascriptFunction("downloadUpdated", results_value);
 }
 
+void DownloadsDOMHandler::OnDownloadDestructed(
+    content::DownloadItem* download) {
+  download->RemoveObserver(this);
+  OrderedDownloads::iterator it = std::find(download_items_.begin(),
+                                            download_items_.end(),
+                                            download);
+  *it = NULL;
+  // A later ModelChanged() notification will change the WebUI's
+  // view of the downloads list.
+}
+
 // A download has started or been deleted. Query our DownloadManager for the
 // current set of downloads.
 void DownloadsDOMHandler::ModelChanged(content::DownloadManager* manager) {