MD Downloads: check for removed files on page load

chrome/browser/ui/webui/md_downloads/md_downloads_dom_handler.cc

Index: chrome/browser/ui/webui/md_downloads/md_downloads_dom_handler.cc
diff --git a/chrome/browser/ui/webui/md_downloads/md_downloads_dom_handler.cc b/chrome/browser/ui/webui/md_downloads/md_downloads_dom_handler.cc
index 8a811f4fc391ddc7320df141599a841e88672028..59698e65f0cd7638ec867bfd5a0120cbb24fdc70 100644
--- a/chrome/browser/ui/webui/md_downloads/md_downloads_dom_handler.cc
+++ b/chrome/browser/ui/webui/md_downloads/md_downloads_dom_handler.cc
@@ -82,6 +82,7 @@ MdDownloadsDOMHandler::MdDownloadsDOMHandler(
   Profile* profile = Profile::FromBrowserContext(
       download_manager->GetBrowserContext());
   content::URLDataSource::Add(profile, new FileIconSource());
+  CheckForRemovedFiles();
 }
 
 MdDownloadsDOMHandler::~MdDownloadsDOMHandler() {
@@ -136,6 +137,7 @@ void MdDownloadsDOMHandler::RenderViewReused(
     content::RenderViewHost* render_view_host) {
   list_tracker_.Stop();
   list_tracker_.Reset();
+  CheckForRemovedFiles();
 }
 
 void MdDownloadsDOMHandler::HandleGetDownloads(const base::ListValue* args) {
@@ -409,3 +411,10 @@ content::DownloadItem* MdDownloadsDOMHandler::GetDownloadById(uint32_t id) {
 content::WebContents* MdDownloadsDOMHandler::GetWebUIWebContents() {
   return web_ui()->GetWebContents();
 }
+
+void MdDownloadsDOMHandler::CheckForRemovedFiles() {
+  if (GetMainNotifierManager())
+    GetMainNotifierManager()->CheckForHistoryFilesRemoval();
+  if (GetOriginalNotifierManager())
+    GetOriginalNotifierManager()->CheckForHistoryFilesRemoval();
+}