Reland DownloadManager::GetAllDownloads actually does now

chrome/browser/extensions/api/downloads/downloads_api.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/extensions/api/downloads/downloads_api.h"
 
 #include <algorithm>
 #include <cctype>
 #include <iterator>
 #include <set>
@@ skipping 453 matching lines @@
   }
 
   DownloadQuery::DownloadVector all_items;
   if (query_in.id.get()) {
     DownloadItem* item = manager->GetDownload(*query_in.id.get());
     if (!item && incognito_manager)
       item = incognito_manager->GetDownload(*query_in.id.get());
     if (item)
       all_items.push_back(item);
   } else {
-    manager->GetAllDownloads(FilePath(FILE_PATH_LITERAL("")), &all_items);
+    manager->GetAllDownloads(&all_items);
     if (incognito_manager)
-      incognito_manager->GetAllDownloads(
-          FilePath(FILE_PATH_LITERAL("")), &all_items);
+      incognito_manager->GetAllDownloads(&all_items);
   }
+  query_out.AddFilter(base::Bind(&IsNotTemporaryDownloadFilter));
   query_out.Search(all_items.begin(), all_items.end(), results);
 }
 
 void DispatchEventInternal(
     Profile* target_profile,
     const char* event_name,
     const std::string& json_args,
     scoped_ptr<base::ListValue> event_args) {
   target_profile->GetExtensionEventRouter()->DispatchEventToRenderers(
       event_name,
@@ skipping 497 matching lines @@
   if (profile_->HasOffTheRecordProfile() &&
       !profile_->IsOffTheRecord()) {
     DispatchEventInternal(
         profile_->GetOffTheRecordProfile(),
         event_name,
         json_args,
         scoped_ptr<base::ListValue>(args->DeepCopy()));
   }
   DispatchEventInternal(profile_, event_name, json_args, args.Pass());
 }