downloads: prevent "Clear all" from removing in progress downloads

chrome/browser/ui/webui/downloads_dom_handler.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/ui/webui/downloads_dom_handler.h"
 
 #include <algorithm>
 #include <functional>
 
 #include "base/basictypes.h"
@@ skipping 525 matching lines @@
     main_notifier_.GetManager()->GetAllDownloads(&downloads);
   if (original_notifier_ && original_notifier_->GetManager())
     original_notifier_->GetManager()->GetAllDownloads(&downloads);
   RemoveDownloads(downloads);
 }
 
 void DownloadsDOMHandler::RemoveDownloads(
     const std::vector<content::DownloadItem*>& to_remove) {
   std::set<uint32> ids;
   for (auto* download : to_remove) {
-    if (IsRemoved(*download))
+    if (IsRemoved(*download) ||
+        download->GetState() == content::DownloadItem::IN_PROGRESS) {
       continue;
+    }
 
     DownloadsDOMHandlerData::Create(download)->set_is_removed(true);
     ids.insert(download->GetId());
     download->UpdateObservers();
   }
   removes_.push_back(ids);
 }
 
 void DownloadsDOMHandler::HandleOpenDownloadsFolder(
     const base::ListValue* args) {
@@ skipping 118 matching lines @@
 }
 
 void DownloadsDOMHandler::CallDownloadsList(const base::ListValue& downloads) {
   web_ui()->CallJavascriptFunction("downloadsList", downloads);
 }
 
 void DownloadsDOMHandler::CallDownloadUpdated(
     const base::ListValue& download_item) {
   web_ui()->CallJavascriptFunction("downloadUpdated", download_item);
 }